How to check if PAE is enabled? (Windows 7 32 bits)
up vote
5
down vote
favorite
How to tell for sure if PAE (Physical Address Extensions) is enabled or not?
There is a SPECIFIC command I can use? I can read a registry value or something?
(Windows 7 32 bits)
I have found this on Internet but it doesn't answer my question:
If your server has hot-add memory ability (ability to add more memory
without shutting down the server !!) or data execution prevention
(DEP) is enabled then PAE will be enabled automatically !!
It only reformulate the question as "does my Qosmio x505 laptop support hot-add memory?"
windows memory-limit pae
asked Aug 9 '11 at 17:50
Rigel
1,00662141
add a comment |
up vote
5
down vote
favorite
How to tell for sure if PAE (Physical Address Extensions) is enabled or not?
There is a SPECIFIC command I can use? I can read a registry value or something?
(Windows 7 32 bits)
I have found this on Internet but it doesn't answer my question:
If your server has hot-add memory ability (ability to add more memory
without shutting down the server !!) or data execution prevention
(DEP) is enabled then PAE will be enabled automatically !!
It only reformulate the question as "does my Qosmio x505 laptop support hot-add memory?"
windows memory-limit pae
asked Aug 9 '11 at 17:50
Rigel
1,00662141
2
Having PAE does not automatically imply that all of the features that it allows will be available. It is incredibly rare, and almost completely unnecessary for home computers and laptops to support hot-plugging memory and I would be incredibly surprised if your system did.
– Mokubai♦
Aug 9 '11 at 18:14
"Having PAE does not automatically imply" - - - I know, and this is why I want to VERIFY it.
– Rigel
Aug 9 '11 at 18:19
1
Could you accept Victor's answer below? It does actually answer the question.
– Dan Dascalescu
Jan 7 '13 at 2:29
There are multiple models of the Toshiba Qosmio x505 laptop. Do you have the Q8100X, Q8102X, Q8104X, Q830, Q832, Q850, Q860, Q862, Q865, Q870, Q875, Q879, Q880, Q882, Q885, Q887, Q888, Q890, Q892, Q893, Q894, Q896, Q898, SP8016L, SP8016M, SP8017L, SP8017M, SP8018L, SP8018M, SP8019L, SP8019M, SP8020L, SP8020M, SP8021L, SP8021M, SP8130, SP8130L, SP8915A, SP8915C, or SP8915R? Please click on edit above at left, and add the model number from the serial number plate or sticker underneath the laptop, so we can provide the best advice.
– K7AAY
Nov 16 at 0:22
add a comment |
up vote
5
down vote
favorite
up vote
5
down vote
favorite
How to tell for sure if PAE (Physical Address Extensions) is enabled or not?
There is a SPECIFIC command I can use? I can read a registry value or something?
(Windows 7 32 bits)
I have found this on Internet but it doesn't answer my question:
If your server has hot-add memory ability (ability to add more memory
without shutting down the server !!) or data execution prevention
(DEP) is enabled then PAE will be enabled automatically !!
It only reformulate the question as "does my Qosmio x505 laptop support hot-add memory?"
windows memory-limit pae
asked Aug 9 '11 at 17:50
Rigel
1,00662141
How to tell for sure if PAE (Physical Address Extensions) is enabled or not?
There is a SPECIFIC command I can use? I can read a registry value or something?
(Windows 7 32 bits)
I have found this on Internet but it doesn't answer my question:
If your server has hot-add memory ability (ability to add more memory
without shutting down the server !!) or data execution prevention
(DEP) is enabled then PAE will be enabled automatically !!
It only reformulate the question as "does my Qosmio x505 laptop support hot-add memory?"
windows memory-limit pae
windows memory-limit pae
asked Aug 9 '11 at 17:50
Rigel
1,00662141
asked Aug 9 '11 at 17:50
Rigel
1,00662141
edited Aug 9 '11 at 20:22
asked Aug 9 '11 at 17:50
Rigel
1,00662141
asked Aug 9 '11 at 17:50
Rigel
1,00662141
asked Aug 9 '11 at 17:50
Rigel
1,00662141
1,00662141
2
Having PAE does not automatically imply that all of the features that it allows will be available. It is incredibly rare, and almost completely unnecessary for home computers and laptops to support hot-plugging memory and I would be incredibly surprised if your system did.
– Mokubai♦
Aug 9 '11 at 18:14
"Having PAE does not automatically imply" - - - I know, and this is why I want to VERIFY it.
– Rigel
Aug 9 '11 at 18:19
1
Could you accept Victor's answer below? It does actually answer the question.
– Dan Dascalescu
Jan 7 '13 at 2:29
There are multiple models of the Toshiba Qosmio x505 laptop. Do you have the Q8100X, Q8102X, Q8104X, Q830, Q832, Q850, Q860, Q862, Q865, Q870, Q875, Q879, Q880, Q882, Q885, Q887, Q888, Q890, Q892, Q893, Q894, Q896, Q898, SP8016L, SP8016M, SP8017L, SP8017M, SP8018L, SP8018M, SP8019L, SP8019M, SP8020L, SP8020M, SP8021L, SP8021M, SP8130, SP8130L, SP8915A, SP8915C, or SP8915R? Please click on edit above at left, and add the model number from the serial number plate or sticker underneath the laptop, so we can provide the best advice.
– K7AAY
Nov 16 at 0:22
add a comment |
2
Having PAE does not automatically imply that all of the features that it allows will be available. It is incredibly rare, and almost completely unnecessary for home computers and laptops to support hot-plugging memory and I would be incredibly surprised if your system did.
– Mokubai♦
Aug 9 '11 at 18:14
"Having PAE does not automatically imply" - - - I know, and this is why I want to VERIFY it.
– Rigel
Aug 9 '11 at 18:19
1
Could you accept Victor's answer below? It does actually answer the question.
– Dan Dascalescu
Jan 7 '13 at 2:29
There are multiple models of the Toshiba Qosmio x505 laptop. Do you have the Q8100X, Q8102X, Q8104X, Q830, Q832, Q850, Q860, Q862, Q865, Q870, Q875, Q879, Q880, Q882, Q885, Q887, Q888, Q890, Q892, Q893, Q894, Q896, Q898, SP8016L, SP8016M, SP8017L, SP8017M, SP8018L, SP8018M, SP8019L, SP8019M, SP8020L, SP8020M, SP8021L, SP8021M, SP8130, SP8130L, SP8915A, SP8915C, or SP8915R? Please click on edit above at left, and add the model number from the serial number plate or sticker underneath the laptop, so we can provide the best advice.
– K7AAY
Nov 16 at 0:22
2
2
Having PAE does not automatically imply that all of the features that it allows will be available. It is incredibly rare, and almost completely unnecessary for home computers and laptops to support hot-plugging memory and I would be incredibly surprised if your system did.
– Mokubai♦
Aug 9 '11 at 18:14
Having PAE does not automatically imply that all of the features that it allows will be available. It is incredibly rare, and almost completely unnecessary for home computers and laptops to support hot-plugging memory and I would be incredibly surprised if your system did.
– Mokubai♦
Aug 9 '11 at 18:14
"Having PAE does not automatically imply" - - - I know, and this is why I want to VERIFY it.
– Rigel
Aug 9 '11 at 18:19
"Having PAE does not automatically imply" - - - I know, and this is why I want to VERIFY it.
– Rigel
Aug 9 '11 at 18:19
1
1
Could you accept Victor's answer below? It does actually answer the question.
– Dan Dascalescu
Jan 7 '13 at 2:29
Could you accept Victor's answer below? It does actually answer the question.
– Dan Dascalescu
Jan 7 '13 at 2:29
There are multiple models of the Toshiba Qosmio x505 laptop. Do you have the Q8100X, Q8102X, Q8104X, Q830, Q832, Q850, Q860, Q862, Q865, Q870, Q875, Q879, Q880, Q882, Q885, Q887, Q888, Q890, Q892, Q893, Q894, Q896, Q898, SP8016L, SP8016M, SP8017L, SP8017M, SP8018L, SP8018M, SP8019L, SP8019M, SP8020L, SP8020M, SP8021L, SP8021M, SP8130, SP8130L, SP8915A, SP8915C, or SP8915R? Please click on edit above at left, and add the model number from the serial number plate or sticker underneath the laptop, so we can provide the best advice.
– K7AAY
Nov 16 at 0:22
There are multiple models of the Toshiba Qosmio x505 laptop. Do you have the Q8100X, Q8102X, Q8104X, Q830, Q832, Q850, Q860, Q862, Q865, Q870, Q875, Q879, Q880, Q882, Q885, Q887, Q888, Q890, Q892, Q893, Q894, Q896, Q898, SP8016L, SP8016M, SP8017L, SP8017M, SP8018L, SP8018M, SP8019L, SP8019M, SP8020L, SP8020M, SP8021L, SP8021M, SP8130, SP8130L, SP8915A, SP8915C, or SP8915R? Please click on edit above at left, and add the model number from the serial number plate or sticker underneath the laptop, so we can provide the best advice.
– K7AAY
Nov 16 at 0:22
add a comment |
6 Answers
6
active
oldest
votes
up vote
3
down vote
accepted
How to tell for sure if PAE (Physical Address Extensions) is enabled or not?
On any modern Intel/AMD (x86/x64) system with hardware-level DEP, PAE is enabled out of the box on Windows XP (SP2?) and up, since it's required for the DEP feature to work.
"does my Qosmio x505 laptop support hot-add memory?"
No, it most assuredly does not.
Hot-add RAM is generally only found on high-end server hardware.
Edit:
According to MSDN Entry for PAE, it's enabled by default under certain (common) conditions:
Windows automatically enables PAE if DEP is enabled on a computer that supports hardware-enabled DEP, or if the computer is configured for hot-add memory devices in memory ranges beyond 4 GB. If the computer does not support hardware-enabled DEP or is not configured for hot-add memory devices in memory ranges beyond 4 GB, PAE must be explicitly enabled.
So, if the system is booted with PAE force-enabled or supports hardware DEP, PAE is on. That's every single system that's come with Vista or Windows 7 pre-installed, and a significant number of XP systems as well (late P4, Core Solo/Duo, Core 2 systems). The only caveat is if someone has gone out of their way to force disable it by editing the boot.ini file (for XP) or modify the BCD (for Vista/7).
As for how to see that it's enabled, I'm not sure. In XP, if you right click on My Computer and select Properties, the General tab will say Physical Address Extension at the bottom if PAE is enabled. 64-bit Win 7 systems don't seem to say, probably because PAE is always enabled on such systems. 32-bit Win 7 may say something similar in the System Control Panel, but until I can check my home laptop, I can't tell you for sure -- it's the only 32-bit Win 7 system I have access to, all my others are 64-bit.
There doesn't seem to be any registry entry that tells whether or not it's on.
Ultimately, the point is that it's safe to assume it's on unless you have a good reason to believe it's not. If you're writing code that depends on it, use the IsProcessorFeaturePresent function, that's what it's there for.
answered Aug 9 '11 at 18:07
afrazier
20.3k24682
Sorry but you didn't answer my question AT ALL! You just told us how its YOUR laptop. I didn't asked that.
– Rigel
Aug 9 '11 at 18:11
I only mentioned the named laptop because you did. If that's what you own, PAE is on unless you've gone to the trouble to disable it. See my edit for more info.
– afrazier
Aug 9 '11 at 19:09
Thanks. Accepted (because of the 'MSDN Entry for PAE' link).
– Rigel
Aug 9 '11 at 20:22
2
There is an actual answer to your question posted below by ''Victor Drobysh''. Could you accept that one instead?
– rustyx
Sep 8 '12 at 10:06
PAE is always off on 64 bits machines. You don't need 4 bits of address extensions there. (PAE makes the page table 36 bits wide on 32 bits systems; on 64 bits systems it's already 48 bits wide)
– MSalters
Jul 16 '13 at 11:47
|
show 3 more comments
up vote
16
down vote
To use the graphical user interface to determine whether PAE is enabled, follow these steps:
- Click Start, click Run, type
wbemtestin the Open box, and then click OK. - In the Windows Management Instrumentation Tester dialog box, click Connect.
- In the box at the top of the Connect dialog box, type
rootcimv2, and then click Connect. - Click #Enum Instances".
- In the Class Info dialog box, type
Win32_OperatingSystemin the Enter superclass name box, and then click OK. - In the Query Result dialog box, double-click the top item. Note this item starts with "Win32_OperatingSystem.Name=Microsoft..."
- In the Object editor dialog box, locate the
PAEEnabledproperty in the Properties area and double-click on it. - In the Property Editor dialog box, note the value in the Value box.
edited Aug 30 '12 at 9:21
Indrek
20.3k117284
answered Aug 29 '12 at 22:33
Victor Drobysh
16113
Awesome! I would never have found this :) Thank you
– rustyx
Sep 8 '12 at 10:05
Works perfectly on windows 7. I should note that you can enable it by editing the BCD, EasyBCD makes it simple... with a trial.
– Ray Foss
Feb 3 '13 at 5:01
It's strange that this precise reply is not marked as an answer.
– Mike B.
Jan 8 at 9:06
add a comment |
up vote
12
down vote
WMI will give you this via the command line util 'WMIC', for example:
C:> wmic os get PAEEnabled
PAEEnabled
TRUE
C:>
Or with Powershell:
PS> (Get-WmiObject win32_operatingsystem).PAEEnabled
answered Jul 16 '13 at 11:22
Chris J
4441617
Thanks, the easiest way to check if PAE is enabled.
– Mike B.
Jan 8 at 9:07
add a comment |
up vote
3
down vote
There is a registry setting that will tell you whether Physical Address Extension (PAE) is enabled.
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlSession ManagerMemory ManagementPhysicalAddressExtension
If it is set to 1, then the kernel with PAE support was loaded at startup.
answered Mar 12 '13 at 17:19
Alistair McMillan
277112
add a comment |
up vote
0
down vote
A laptop almost certainly does not support hot-add memory. That feature only exists on certain high-end servers.
Windows XP SP2 and later versions of the client OS do not support more than 4GB of memory in 32 bit mode, even with PAE enabled because of driver compatibility issues. PAE is only used so the OS can access the NX bit.
See http://msdn.microsoft.com/en-us/windows/hardware/gg487512
If your CPU supports the NX bit, unless you are booting with the /NOPAE flag the kernel is probably using PAE for hardware DEP support.
answered Aug 9 '11 at 18:07
Chris Smith
28126
Sorry but you didn't answer my question AT ALL! As you said, I also know that P R O B A B L Y my computers has PAE enabled. What I have asked is how do I actually verify it. Computers should not be bibles - to just believe it. We should be able to verify it somehow.
– Rigel
Aug 9 '11 at 18:14
Go to the system control panel (sysdm.cpl). In the general page in the lower right corner it'll list how much memory you have installed. Below that if it says "Physical Address Extension" then PAE is being used. If it does not, PAE is not being used.
– Chris Smith
Aug 9 '11 at 18:56
Ok I guess those instructions only work on XP. I don't have any 32 bit Windows 7 or Vista systems to look at but it must be on one of the system info screens.
– Chris Smith
Aug 9 '11 at 19:05
Hi Chris. I cannot see indeed that screen on my Win 7 laptop. When I press Win+Break keys to see system's properties there is also no mention of pae
– Rigel
Aug 9 '11 at 20:08
@Altar: why would you believe the Bible without question?
– Dan Dascalescu
Jan 7 '13 at 2:30
|
show 1 more comment
up vote
0
down vote
you can simply run command prompt as administrator and execute "bcdedit"
if at all enabled there will be an entry under the operating system parameters as
PaeForceEnabled = true
answered Jan 18 at 16:28
mayank gupta
61
add a comment |
6 Answers
6
active
oldest
votes
6 Answers
6
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
3
down vote
accepted
How to tell for sure if PAE (Physical Address Extensions) is enabled or not?
On any modern Intel/AMD (x86/x64) system with hardware-level DEP, PAE is enabled out of the box on Windows XP (SP2?) and up, since it's required for the DEP feature to work.
"does my Qosmio x505 laptop support hot-add memory?"
No, it most assuredly does not.
Hot-add RAM is generally only found on high-end server hardware.
Edit:
According to MSDN Entry for PAE, it's enabled by default under certain (common) conditions:
Windows automatically enables PAE if DEP is enabled on a computer that supports hardware-enabled DEP, or if the computer is configured for hot-add memory devices in memory ranges beyond 4 GB. If the computer does not support hardware-enabled DEP or is not configured for hot-add memory devices in memory ranges beyond 4 GB, PAE must be explicitly enabled.
So, if the system is booted with PAE force-enabled or supports hardware DEP, PAE is on. That's every single system that's come with Vista or Windows 7 pre-installed, and a significant number of XP systems as well (late P4, Core Solo/Duo, Core 2 systems). The only caveat is if someone has gone out of their way to force disable it by editing the boot.ini file (for XP) or modify the BCD (for Vista/7).
As for how to see that it's enabled, I'm not sure. In XP, if you right click on My Computer and select Properties, the General tab will say Physical Address Extension at the bottom if PAE is enabled. 64-bit Win 7 systems don't seem to say, probably because PAE is always enabled on such systems. 32-bit Win 7 may say something similar in the System Control Panel, but until I can check my home laptop, I can't tell you for sure -- it's the only 32-bit Win 7 system I have access to, all my others are 64-bit.
There doesn't seem to be any registry entry that tells whether or not it's on.
Ultimately, the point is that it's safe to assume it's on unless you have a good reason to believe it's not. If you're writing code that depends on it, use the IsProcessorFeaturePresent function, that's what it's there for.
answered Aug 9 '11 at 18:07
afrazier
20.3k24682
Sorry but you didn't answer my question AT ALL! You just told us how its YOUR laptop. I didn't asked that.
– Rigel
Aug 9 '11 at 18:11
I only mentioned the named laptop because you did. If that's what you own, PAE is on unless you've gone to the trouble to disable it. See my edit for more info.
– afrazier
Aug 9 '11 at 19:09
Thanks. Accepted (because of the 'MSDN Entry for PAE' link).
– Rigel
Aug 9 '11 at 20:22
2
There is an actual answer to your question posted below by ''Victor Drobysh''. Could you accept that one instead?
– rustyx
Sep 8 '12 at 10:06
PAE is always off on 64 bits machines. You don't need 4 bits of address extensions there. (PAE makes the page table 36 bits wide on 32 bits systems; on 64 bits systems it's already 48 bits wide)
– MSalters
Jul 16 '13 at 11:47
|
show 3 more comments
up vote
3
down vote
accepted
How to tell for sure if PAE (Physical Address Extensions) is enabled or not?
On any modern Intel/AMD (x86/x64) system with hardware-level DEP, PAE is enabled out of the box on Windows XP (SP2?) and up, since it's required for the DEP feature to work.
"does my Qosmio x505 laptop support hot-add memory?"
No, it most assuredly does not.
Hot-add RAM is generally only found on high-end server hardware.
Edit:
According to MSDN Entry for PAE, it's enabled by default under certain (common) conditions:
Windows automatically enables PAE if DEP is enabled on a computer that supports hardware-enabled DEP, or if the computer is configured for hot-add memory devices in memory ranges beyond 4 GB. If the computer does not support hardware-enabled DEP or is not configured for hot-add memory devices in memory ranges beyond 4 GB, PAE must be explicitly enabled.
So, if the system is booted with PAE force-enabled or supports hardware DEP, PAE is on. That's every single system that's come with Vista or Windows 7 pre-installed, and a significant number of XP systems as well (late P4, Core Solo/Duo, Core 2 systems). The only caveat is if someone has gone out of their way to force disable it by editing the boot.ini file (for XP) or modify the BCD (for Vista/7).
As for how to see that it's enabled, I'm not sure. In XP, if you right click on My Computer and select Properties, the General tab will say Physical Address Extension at the bottom if PAE is enabled. 64-bit Win 7 systems don't seem to say, probably because PAE is always enabled on such systems. 32-bit Win 7 may say something similar in the System Control Panel, but until I can check my home laptop, I can't tell you for sure -- it's the only 32-bit Win 7 system I have access to, all my others are 64-bit.
There doesn't seem to be any registry entry that tells whether or not it's on.
Ultimately, the point is that it's safe to assume it's on unless you have a good reason to believe it's not. If you're writing code that depends on it, use the IsProcessorFeaturePresent function, that's what it's there for.
answered Aug 9 '11 at 18:07
afrazier
20.3k24682
Sorry but you didn't answer my question AT ALL! You just told us how its YOUR laptop. I didn't asked that.
– Rigel
Aug 9 '11 at 18:11
I only mentioned the named laptop because you did. If that's what you own, PAE is on unless you've gone to the trouble to disable it. See my edit for more info.
– afrazier
Aug 9 '11 at 19:09
Thanks. Accepted (because of the 'MSDN Entry for PAE' link).
– Rigel
Aug 9 '11 at 20:22
2
There is an actual answer to your question posted below by ''Victor Drobysh''. Could you accept that one instead?
– rustyx
Sep 8 '12 at 10:06
PAE is always off on 64 bits machines. You don't need 4 bits of address extensions there. (PAE makes the page table 36 bits wide on 32 bits systems; on 64 bits systems it's already 48 bits wide)
– MSalters
Jul 16 '13 at 11:47
|
show 3 more comments
up vote
3
down vote
accepted
up vote
3
down vote
accepted
How to tell for sure if PAE (Physical Address Extensions) is enabled or not?
On any modern Intel/AMD (x86/x64) system with hardware-level DEP, PAE is enabled out of the box on Windows XP (SP2?) and up, since it's required for the DEP feature to work.
"does my Qosmio x505 laptop support hot-add memory?"
No, it most assuredly does not.
Hot-add RAM is generally only found on high-end server hardware.
Edit:
According to MSDN Entry for PAE, it's enabled by default under certain (common) conditions:
Windows automatically enables PAE if DEP is enabled on a computer that supports hardware-enabled DEP, or if the computer is configured for hot-add memory devices in memory ranges beyond 4 GB. If the computer does not support hardware-enabled DEP or is not configured for hot-add memory devices in memory ranges beyond 4 GB, PAE must be explicitly enabled.
So, if the system is booted with PAE force-enabled or supports hardware DEP, PAE is on. That's every single system that's come with Vista or Windows 7 pre-installed, and a significant number of XP systems as well (late P4, Core Solo/Duo, Core 2 systems). The only caveat is if someone has gone out of their way to force disable it by editing the boot.ini file (for XP) or modify the BCD (for Vista/7).
As for how to see that it's enabled, I'm not sure. In XP, if you right click on My Computer and select Properties, the General tab will say Physical Address Extension at the bottom if PAE is enabled. 64-bit Win 7 systems don't seem to say, probably because PAE is always enabled on such systems. 32-bit Win 7 may say something similar in the System Control Panel, but until I can check my home laptop, I can't tell you for sure -- it's the only 32-bit Win 7 system I have access to, all my others are 64-bit.
There doesn't seem to be any registry entry that tells whether or not it's on.
Ultimately, the point is that it's safe to assume it's on unless you have a good reason to believe it's not. If you're writing code that depends on it, use the IsProcessorFeaturePresent function, that's what it's there for.
answered Aug 9 '11 at 18:07
afrazier
20.3k24682
How to tell for sure if PAE (Physical Address Extensions) is enabled or not?
On any modern Intel/AMD (x86/x64) system with hardware-level DEP, PAE is enabled out of the box on Windows XP (SP2?) and up, since it's required for the DEP feature to work.
"does my Qosmio x505 laptop support hot-add memory?"
No, it most assuredly does not.
Hot-add RAM is generally only found on high-end server hardware.
Edit:
According to MSDN Entry for PAE, it's enabled by default under certain (common) conditions:
Windows automatically enables PAE if DEP is enabled on a computer that supports hardware-enabled DEP, or if the computer is configured for hot-add memory devices in memory ranges beyond 4 GB. If the computer does not support hardware-enabled DEP or is not configured for hot-add memory devices in memory ranges beyond 4 GB, PAE must be explicitly enabled.
So, if the system is booted with PAE force-enabled or supports hardware DEP, PAE is on. That's every single system that's come with Vista or Windows 7 pre-installed, and a significant number of XP systems as well (late P4, Core Solo/Duo, Core 2 systems). The only caveat is if someone has gone out of their way to force disable it by editing the boot.ini file (for XP) or modify the BCD (for Vista/7).
As for how to see that it's enabled, I'm not sure. In XP, if you right click on My Computer and select Properties, the General tab will say Physical Address Extension at the bottom if PAE is enabled. 64-bit Win 7 systems don't seem to say, probably because PAE is always enabled on such systems. 32-bit Win 7 may say something similar in the System Control Panel, but until I can check my home laptop, I can't tell you for sure -- it's the only 32-bit Win 7 system I have access to, all my others are 64-bit.
There doesn't seem to be any registry entry that tells whether or not it's on.
Ultimately, the point is that it's safe to assume it's on unless you have a good reason to believe it's not. If you're writing code that depends on it, use the IsProcessorFeaturePresent function, that's what it's there for.
answered Aug 9 '11 at 18:07
afrazier
20.3k24682
edited Aug 9 '11 at 19:08
answered Aug 9 '11 at 18:07
afrazier
20.3k24682
answered Aug 9 '11 at 18:07
afrazier
20.3k24682
answered Aug 9 '11 at 18:07
afrazier
20.3k24682
20.3k24682
Sorry but you didn't answer my question AT ALL! You just told us how its YOUR laptop. I didn't asked that.
– Rigel
Aug 9 '11 at 18:11
I only mentioned the named laptop because you did. If that's what you own, PAE is on unless you've gone to the trouble to disable it. See my edit for more info.
– afrazier
Aug 9 '11 at 19:09
Thanks. Accepted (because of the 'MSDN Entry for PAE' link).
– Rigel
Aug 9 '11 at 20:22
2
There is an actual answer to your question posted below by ''Victor Drobysh''. Could you accept that one instead?
– rustyx
Sep 8 '12 at 10:06
PAE is always off on 64 bits machines. You don't need 4 bits of address extensions there. (PAE makes the page table 36 bits wide on 32 bits systems; on 64 bits systems it's already 48 bits wide)
– MSalters
Jul 16 '13 at 11:47
|
show 3 more comments
Sorry but you didn't answer my question AT ALL! You just told us how its YOUR laptop. I didn't asked that.
– Rigel
Aug 9 '11 at 18:11
I only mentioned the named laptop because you did. If that's what you own, PAE is on unless you've gone to the trouble to disable it. See my edit for more info.
– afrazier
Aug 9 '11 at 19:09
Thanks. Accepted (because of the 'MSDN Entry for PAE' link).
– Rigel
Aug 9 '11 at 20:22
2
There is an actual answer to your question posted below by ''Victor Drobysh''. Could you accept that one instead?
– rustyx
Sep 8 '12 at 10:06
PAE is always off on 64 bits machines. You don't need 4 bits of address extensions there. (PAE makes the page table 36 bits wide on 32 bits systems; on 64 bits systems it's already 48 bits wide)
– MSalters
Jul 16 '13 at 11:47
Sorry but you didn't answer my question AT ALL! You just told us how its YOUR laptop. I didn't asked that.
– Rigel
Aug 9 '11 at 18:11
Sorry but you didn't answer my question AT ALL! You just told us how its YOUR laptop. I didn't asked that.
– Rigel
Aug 9 '11 at 18:11
I only mentioned the named laptop because you did. If that's what you own, PAE is on unless you've gone to the trouble to disable it. See my edit for more info.
– afrazier
Aug 9 '11 at 19:09
I only mentioned the named laptop because you did. If that's what you own, PAE is on unless you've gone to the trouble to disable it. See my edit for more info.
– afrazier
Aug 9 '11 at 19:09
Thanks. Accepted (because of the 'MSDN Entry for PAE' link).
– Rigel
Aug 9 '11 at 20:22
Thanks. Accepted (because of the 'MSDN Entry for PAE' link).
– Rigel
Aug 9 '11 at 20:22
2
2
There is an actual answer to your question posted below by ''Victor Drobysh''. Could you accept that one instead?
– rustyx
Sep 8 '12 at 10:06
There is an actual answer to your question posted below by ''Victor Drobysh''. Could you accept that one instead?
– rustyx
Sep 8 '12 at 10:06
PAE is always off on 64 bits machines. You don't need 4 bits of address extensions there. (PAE makes the page table 36 bits wide on 32 bits systems; on 64 bits systems it's already 48 bits wide)
– MSalters
Jul 16 '13 at 11:47
PAE is always off on 64 bits machines. You don't need 4 bits of address extensions there. (PAE makes the page table 36 bits wide on 32 bits systems; on 64 bits systems it's already 48 bits wide)
– MSalters
Jul 16 '13 at 11:47
|
show 3 more comments
up vote
16
down vote
To use the graphical user interface to determine whether PAE is enabled, follow these steps:
- Click Start, click Run, type
wbemtestin the Open box, and then click OK. - In the Windows Management Instrumentation Tester dialog box, click Connect.
- In the box at the top of the Connect dialog box, type
rootcimv2, and then click Connect. - Click #Enum Instances".
- In the Class Info dialog box, type
Win32_OperatingSystemin the Enter superclass name box, and then click OK. - In the Query Result dialog box, double-click the top item. Note this item starts with "Win32_OperatingSystem.Name=Microsoft..."
- In the Object editor dialog box, locate the
PAEEnabledproperty in the Properties area and double-click on it. - In the Property Editor dialog box, note the value in the Value box.
edited Aug 30 '12 at 9:21
Indrek
20.3k117284
answered Aug 29 '12 at 22:33
Victor Drobysh
16113
Awesome! I would never have found this :) Thank you
– rustyx
Sep 8 '12 at 10:05
Works perfectly on windows 7. I should note that you can enable it by editing the BCD, EasyBCD makes it simple... with a trial.
– Ray Foss
Feb 3 '13 at 5:01
It's strange that this precise reply is not marked as an answer.
– Mike B.
Jan 8 at 9:06
add a comment |
up vote
16
down vote
To use the graphical user interface to determine whether PAE is enabled, follow these steps:
- Click Start, click Run, type
wbemtestin the Open box, and then click OK. - In the Windows Management Instrumentation Tester dialog box, click Connect.
- In the box at the top of the Connect dialog box, type
rootcimv2, and then click Connect. - Click #Enum Instances".
- In the Class Info dialog box, type
Win32_OperatingSystemin the Enter superclass name box, and then click OK. - In the Query Result dialog box, double-click the top item. Note this item starts with "Win32_OperatingSystem.Name=Microsoft..."
- In the Object editor dialog box, locate the
PAEEnabledproperty in the Properties area and double-click on it. - In the Property Editor dialog box, note the value in the Value box.
edited Aug 30 '12 at 9:21
Indrek
20.3k117284
answered Aug 29 '12 at 22:33
Victor Drobysh
16113
Awesome! I would never have found this :) Thank you
– rustyx
Sep 8 '12 at 10:05
Works perfectly on windows 7. I should note that you can enable it by editing the BCD, EasyBCD makes it simple... with a trial.
– Ray Foss
Feb 3 '13 at 5:01
It's strange that this precise reply is not marked as an answer.
– Mike B.
Jan 8 at 9:06
add a comment |
up vote
16
down vote
up vote
16
down vote
To use the graphical user interface to determine whether PAE is enabled, follow these steps:
- Click Start, click Run, type
wbemtestin the Open box, and then click OK. - In the Windows Management Instrumentation Tester dialog box, click Connect.
- In the box at the top of the Connect dialog box, type
rootcimv2, and then click Connect. - Click #Enum Instances".
- In the Class Info dialog box, type
Win32_OperatingSystemin the Enter superclass name box, and then click OK. - In the Query Result dialog box, double-click the top item. Note this item starts with "Win32_OperatingSystem.Name=Microsoft..."
- In the Object editor dialog box, locate the
PAEEnabledproperty in the Properties area and double-click on it. - In the Property Editor dialog box, note the value in the Value box.
edited Aug 30 '12 at 9:21
Indrek
20.3k117284
answered Aug 29 '12 at 22:33
Victor Drobysh
16113
To use the graphical user interface to determine whether PAE is enabled, follow these steps:
- Click Start, click Run, type
wbemtestin the Open box, and then click OK. - In the Windows Management Instrumentation Tester dialog box, click Connect.
- In the box at the top of the Connect dialog box, type
rootcimv2, and then click Connect. - Click #Enum Instances".
- In the Class Info dialog box, type
Win32_OperatingSystemin the Enter superclass name box, and then click OK. - In the Query Result dialog box, double-click the top item. Note this item starts with "Win32_OperatingSystem.Name=Microsoft..."
- In the Object editor dialog box, locate the
PAEEnabledproperty in the Properties area and double-click on it. - In the Property Editor dialog box, note the value in the Value box.
edited Aug 30 '12 at 9:21
Indrek
20.3k117284
answered Aug 29 '12 at 22:33
Victor Drobysh
16113
edited Aug 30 '12 at 9:21
Indrek
20.3k117284
edited Aug 30 '12 at 9:21
Indrek
20.3k117284
edited Aug 30 '12 at 9:21
Indrek
20.3k117284
20.3k117284
answered Aug 29 '12 at 22:33
Victor Drobysh
16113
answered Aug 29 '12 at 22:33
Victor Drobysh
16113
answered Aug 29 '12 at 22:33
Victor Drobysh
16113
16113
Awesome! I would never have found this :) Thank you
– rustyx
Sep 8 '12 at 10:05
Works perfectly on windows 7. I should note that you can enable it by editing the BCD, EasyBCD makes it simple... with a trial.
– Ray Foss
Feb 3 '13 at 5:01
It's strange that this precise reply is not marked as an answer.
– Mike B.
Jan 8 at 9:06
add a comment |
Awesome! I would never have found this :) Thank you
– rustyx
Sep 8 '12 at 10:05
Works perfectly on windows 7. I should note that you can enable it by editing the BCD, EasyBCD makes it simple... with a trial.
– Ray Foss
Feb 3 '13 at 5:01
It's strange that this precise reply is not marked as an answer.
– Mike B.
Jan 8 at 9:06
Awesome! I would never have found this :) Thank you
– rustyx
Sep 8 '12 at 10:05
Awesome! I would never have found this :) Thank you
– rustyx
Sep 8 '12 at 10:05
Works perfectly on windows 7. I should note that you can enable it by editing the BCD, EasyBCD makes it simple... with a trial.
– Ray Foss
Feb 3 '13 at 5:01
Works perfectly on windows 7. I should note that you can enable it by editing the BCD, EasyBCD makes it simple... with a trial.
– Ray Foss
Feb 3 '13 at 5:01
It's strange that this precise reply is not marked as an answer.
– Mike B.
Jan 8 at 9:06
It's strange that this precise reply is not marked as an answer.
– Mike B.
Jan 8 at 9:06
add a comment |
up vote
12
down vote
WMI will give you this via the command line util 'WMIC', for example:
C:> wmic os get PAEEnabled
PAEEnabled
TRUE
C:>
Or with Powershell:
PS> (Get-WmiObject win32_operatingsystem).PAEEnabled
answered Jul 16 '13 at 11:22
Chris J
4441617
Thanks, the easiest way to check if PAE is enabled.
– Mike B.
Jan 8 at 9:07
add a comment |
up vote
12
down vote
WMI will give you this via the command line util 'WMIC', for example:
C:> wmic os get PAEEnabled
PAEEnabled
TRUE
C:>
Or with Powershell:
PS> (Get-WmiObject win32_operatingsystem).PAEEnabled
answered Jul 16 '13 at 11:22
Chris J
4441617
Thanks, the easiest way to check if PAE is enabled.
– Mike B.
Jan 8 at 9:07
add a comment |
up vote
12
down vote
up vote
12
down vote
WMI will give you this via the command line util 'WMIC', for example:
C:> wmic os get PAEEnabled
PAEEnabled
TRUE
C:>
Or with Powershell:
PS> (Get-WmiObject win32_operatingsystem).PAEEnabled
answered Jul 16 '13 at 11:22
Chris J
4441617
WMI will give you this via the command line util 'WMIC', for example:
C:> wmic os get PAEEnabled
PAEEnabled
TRUE
C:>
Or with Powershell:
PS> (Get-WmiObject win32_operatingsystem).PAEEnabled
answered Jul 16 '13 at 11:22
Chris J
4441617
edited Jan 8 at 10:10
answered Jul 16 '13 at 11:22
Chris J
4441617
answered Jul 16 '13 at 11:22
Chris J
4441617
answered Jul 16 '13 at 11:22
Chris J
4441617
4441617
Thanks, the easiest way to check if PAE is enabled.
– Mike B.
Jan 8 at 9:07
add a comment |
Thanks, the easiest way to check if PAE is enabled.
– Mike B.
Jan 8 at 9:07
Thanks, the easiest way to check if PAE is enabled.
– Mike B.
Jan 8 at 9:07
Thanks, the easiest way to check if PAE is enabled.
– Mike B.
Jan 8 at 9:07
add a comment |
up vote
3
down vote
There is a registry setting that will tell you whether Physical Address Extension (PAE) is enabled.
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlSession ManagerMemory ManagementPhysicalAddressExtension
If it is set to 1, then the kernel with PAE support was loaded at startup.
answered Mar 12 '13 at 17:19
Alistair McMillan
277112
add a comment |
up vote
3
down vote
There is a registry setting that will tell you whether Physical Address Extension (PAE) is enabled.
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlSession ManagerMemory ManagementPhysicalAddressExtension
If it is set to 1, then the kernel with PAE support was loaded at startup.
answered Mar 12 '13 at 17:19
Alistair McMillan
277112
add a comment |
up vote
3
down vote
up vote
3
down vote
There is a registry setting that will tell you whether Physical Address Extension (PAE) is enabled.
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlSession ManagerMemory ManagementPhysicalAddressExtension
If it is set to 1, then the kernel with PAE support was loaded at startup.
answered Mar 12 '13 at 17:19
Alistair McMillan
277112
There is a registry setting that will tell you whether Physical Address Extension (PAE) is enabled.
HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlSession ManagerMemory ManagementPhysicalAddressExtension
If it is set to 1, then the kernel with PAE support was loaded at startup.
answered Mar 12 '13 at 17:19
Alistair McMillan
277112
answered Mar 12 '13 at 17:19
Alistair McMillan
277112
answered Mar 12 '13 at 17:19
Alistair McMillan
277112
answered Mar 12 '13 at 17:19
Alistair McMillan
277112
277112
add a comment |
add a comment |
up vote
0
down vote
A laptop almost certainly does not support hot-add memory. That feature only exists on certain high-end servers.
Windows XP SP2 and later versions of the client OS do not support more than 4GB of memory in 32 bit mode, even with PAE enabled because of driver compatibility issues. PAE is only used so the OS can access the NX bit.
See http://msdn.microsoft.com/en-us/windows/hardware/gg487512
If your CPU supports the NX bit, unless you are booting with the /NOPAE flag the kernel is probably using PAE for hardware DEP support.
answered Aug 9 '11 at 18:07
Chris Smith
28126
Sorry but you didn't answer my question AT ALL! As you said, I also know that P R O B A B L Y my computers has PAE enabled. What I have asked is how do I actually verify it. Computers should not be bibles - to just believe it. We should be able to verify it somehow.
– Rigel
Aug 9 '11 at 18:14
Go to the system control panel (sysdm.cpl). In the general page in the lower right corner it'll list how much memory you have installed. Below that if it says "Physical Address Extension" then PAE is being used. If it does not, PAE is not being used.
– Chris Smith
Aug 9 '11 at 18:56
Ok I guess those instructions only work on XP. I don't have any 32 bit Windows 7 or Vista systems to look at but it must be on one of the system info screens.
– Chris Smith
Aug 9 '11 at 19:05
Hi Chris. I cannot see indeed that screen on my Win 7 laptop. When I press Win+Break keys to see system's properties there is also no mention of pae
– Rigel
Aug 9 '11 at 20:08
@Altar: why would you believe the Bible without question?
– Dan Dascalescu
Jan 7 '13 at 2:30
|
show 1 more comment
up vote
0
down vote
A laptop almost certainly does not support hot-add memory. That feature only exists on certain high-end servers.
Windows XP SP2 and later versions of the client OS do not support more than 4GB of memory in 32 bit mode, even with PAE enabled because of driver compatibility issues. PAE is only used so the OS can access the NX bit.
See http://msdn.microsoft.com/en-us/windows/hardware/gg487512
If your CPU supports the NX bit, unless you are booting with the /NOPAE flag the kernel is probably using PAE for hardware DEP support.
answered Aug 9 '11 at 18:07
Chris Smith
28126
Sorry but you didn't answer my question AT ALL! As you said, I also know that P R O B A B L Y my computers has PAE enabled. What I have asked is how do I actually verify it. Computers should not be bibles - to just believe it. We should be able to verify it somehow.
– Rigel
Aug 9 '11 at 18:14
Go to the system control panel (sysdm.cpl). In the general page in the lower right corner it'll list how much memory you have installed. Below that if it says "Physical Address Extension" then PAE is being used. If it does not, PAE is not being used.
– Chris Smith
Aug 9 '11 at 18:56
Ok I guess those instructions only work on XP. I don't have any 32 bit Windows 7 or Vista systems to look at but it must be on one of the system info screens.
– Chris Smith
Aug 9 '11 at 19:05
Hi Chris. I cannot see indeed that screen on my Win 7 laptop. When I press Win+Break keys to see system's properties there is also no mention of pae
– Rigel
Aug 9 '11 at 20:08
@Altar: why would you believe the Bible without question?
– Dan Dascalescu
Jan 7 '13 at 2:30
|
show 1 more comment
up vote
0
down vote
up vote
0
down vote
A laptop almost certainly does not support hot-add memory. That feature only exists on certain high-end servers.
Windows XP SP2 and later versions of the client OS do not support more than 4GB of memory in 32 bit mode, even with PAE enabled because of driver compatibility issues. PAE is only used so the OS can access the NX bit.
See http://msdn.microsoft.com/en-us/windows/hardware/gg487512
If your CPU supports the NX bit, unless you are booting with the /NOPAE flag the kernel is probably using PAE for hardware DEP support.
answered Aug 9 '11 at 18:07
Chris Smith
28126
A laptop almost certainly does not support hot-add memory. That feature only exists on certain high-end servers.
Windows XP SP2 and later versions of the client OS do not support more than 4GB of memory in 32 bit mode, even with PAE enabled because of driver compatibility issues. PAE is only used so the OS can access the NX bit.
See http://msdn.microsoft.com/en-us/windows/hardware/gg487512
If your CPU supports the NX bit, unless you are booting with the /NOPAE flag the kernel is probably using PAE for hardware DEP support.
answered Aug 9 '11 at 18:07
Chris Smith
28126
answered Aug 9 '11 at 18:07
Chris Smith
28126
answered Aug 9 '11 at 18:07
Chris Smith
28126
answered Aug 9 '11 at 18:07
Chris Smith
28126
28126
Sorry but you didn't answer my question AT ALL! As you said, I also know that P R O B A B L Y my computers has PAE enabled. What I have asked is how do I actually verify it. Computers should not be bibles - to just believe it. We should be able to verify it somehow.
– Rigel
Aug 9 '11 at 18:14
Go to the system control panel (sysdm.cpl). In the general page in the lower right corner it'll list how much memory you have installed. Below that if it says "Physical Address Extension" then PAE is being used. If it does not, PAE is not being used.
– Chris Smith
Aug 9 '11 at 18:56
Ok I guess those instructions only work on XP. I don't have any 32 bit Windows 7 or Vista systems to look at but it must be on one of the system info screens.
– Chris Smith
Aug 9 '11 at 19:05
Hi Chris. I cannot see indeed that screen on my Win 7 laptop. When I press Win+Break keys to see system's properties there is also no mention of pae
– Rigel
Aug 9 '11 at 20:08
@Altar: why would you believe the Bible without question?
– Dan Dascalescu
Jan 7 '13 at 2:30
|
show 1 more comment
Sorry but you didn't answer my question AT ALL! As you said, I also know that P R O B A B L Y my computers has PAE enabled. What I have asked is how do I actually verify it. Computers should not be bibles - to just believe it. We should be able to verify it somehow.
– Rigel
Aug 9 '11 at 18:14
Go to the system control panel (sysdm.cpl). In the general page in the lower right corner it'll list how much memory you have installed. Below that if it says "Physical Address Extension" then PAE is being used. If it does not, PAE is not being used.
– Chris Smith
Aug 9 '11 at 18:56
Ok I guess those instructions only work on XP. I don't have any 32 bit Windows 7 or Vista systems to look at but it must be on one of the system info screens.
– Chris Smith
Aug 9 '11 at 19:05
Hi Chris. I cannot see indeed that screen on my Win 7 laptop. When I press Win+Break keys to see system's properties there is also no mention of pae
– Rigel
Aug 9 '11 at 20:08
@Altar: why would you believe the Bible without question?
– Dan Dascalescu
Jan 7 '13 at 2:30
Sorry but you didn't answer my question AT ALL! As you said, I also know that P R O B A B L Y my computers has PAE enabled. What I have asked is how do I actually verify it. Computers should not be bibles - to just believe it. We should be able to verify it somehow.
– Rigel
Aug 9 '11 at 18:14
Sorry but you didn't answer my question AT ALL! As you said, I also know that P R O B A B L Y my computers has PAE enabled. What I have asked is how do I actually verify it. Computers should not be bibles - to just believe it. We should be able to verify it somehow.
– Rigel
Aug 9 '11 at 18:14
Go to the system control panel (sysdm.cpl). In the general page in the lower right corner it'll list how much memory you have installed. Below that if it says "Physical Address Extension" then PAE is being used. If it does not, PAE is not being used.
– Chris Smith
Aug 9 '11 at 18:56
Go to the system control panel (sysdm.cpl). In the general page in the lower right corner it'll list how much memory you have installed. Below that if it says "Physical Address Extension" then PAE is being used. If it does not, PAE is not being used.
– Chris Smith
Aug 9 '11 at 18:56
Ok I guess those instructions only work on XP. I don't have any 32 bit Windows 7 or Vista systems to look at but it must be on one of the system info screens.
– Chris Smith
Aug 9 '11 at 19:05
Ok I guess those instructions only work on XP. I don't have any 32 bit Windows 7 or Vista systems to look at but it must be on one of the system info screens.
– Chris Smith
Aug 9 '11 at 19:05
Hi Chris. I cannot see indeed that screen on my Win 7 laptop. When I press Win+Break keys to see system's properties there is also no mention of pae
– Rigel
Aug 9 '11 at 20:08
Hi Chris. I cannot see indeed that screen on my Win 7 laptop. When I press Win+Break keys to see system's properties there is also no mention of pae
– Rigel
Aug 9 '11 at 20:08
@Altar: why would you believe the Bible without question?
– Dan Dascalescu
Jan 7 '13 at 2:30
@Altar: why would you believe the Bible without question?
– Dan Dascalescu
Jan 7 '13 at 2:30
|
show 1 more comment
up vote
0
down vote
you can simply run command prompt as administrator and execute "bcdedit"
if at all enabled there will be an entry under the operating system parameters as
PaeForceEnabled = true
answered Jan 18 at 16:28
mayank gupta
61
add a comment |
up vote
0
down vote
you can simply run command prompt as administrator and execute "bcdedit"
if at all enabled there will be an entry under the operating system parameters as
PaeForceEnabled = true
answered Jan 18 at 16:28
mayank gupta
61
add a comment |
up vote
0
down vote
up vote
0
down vote
you can simply run command prompt as administrator and execute "bcdedit"
if at all enabled there will be an entry under the operating system parameters as
PaeForceEnabled = true
answered Jan 18 at 16:28
mayank gupta
61
you can simply run command prompt as administrator and execute "bcdedit"
if at all enabled there will be an entry under the operating system parameters as
PaeForceEnabled = true
answered Jan 18 at 16:28
mayank gupta
61
answered Jan 18 at 16:28
mayank gupta
61
answered Jan 18 at 16:28
mayank gupta
61
answered Jan 18 at 16:28
mayank gupta
61
61
add a comment |
add a comment |
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Having PAE does not automatically imply that all of the features that it allows will be available. It is incredibly rare, and almost completely unnecessary for home computers and laptops to support hot-plugging memory and I would be incredibly surprised if your system did.
– Mokubai♦
Aug 9 '11 at 18:14
"Having PAE does not automatically imply" - - - I know, and this is why I want to VERIFY it.
– Rigel
Aug 9 '11 at 18:19
1
Could you accept Victor's answer below? It does actually answer the question.
– Dan Dascalescu
Jan 7 '13 at 2:29
There are multiple models of the Toshiba Qosmio x505 laptop. Do you have the Q8100X, Q8102X, Q8104X, Q830, Q832, Q850, Q860, Q862, Q865, Q870, Q875, Q879, Q880, Q882, Q885, Q887, Q888, Q890, Q892, Q893, Q894, Q896, Q898, SP8016L, SP8016M, SP8017L, SP8017M, SP8018L, SP8018M, SP8019L, SP8019M, SP8020L, SP8020M, SP8021L, SP8021M, SP8130, SP8130L, SP8915A, SP8915C, or SP8915R? Please click on edit above at left, and add the model number from the serial number plate or sticker underneath the laptop, so we can provide the best advice.
– K7AAY
Nov 16 at 0:22