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How Can I Enable Physical Address Extension(pae) Feature In Vista?


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5 replies to this topic

#1 hemantonpc

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Posted 27 May 2007 - 12:55 PM

I'm using two windows in my PC
Vista Ultimate and XP SP2 (Both 31-bit)
I enable this feature in XP by adding "\PAE" in boot.ini in XP,
but in Vista there is no boot.ini file,
so how can i enable this feature in Vista,
Ya my processor, motherboard & both windows support this feature

Edited by hemantonpc, 27 May 2007 - 12:55 PM.

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#2 JohnWho

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Posted 27 May 2007 - 02:03 PM

This Microsoft KnowledgeBase Article discusses PAE and Vista.

Supposedly, you can enable PAE in Vista by running "BCDEdit", the boot configuration editor that is included in Vista. You should run this in "administrative mode".

Typing "cmd" in the "start" "search" space, and press Ctrl + Shift + Enter. This runs "cmd" in Administrator Mode.

Then type - "run" Type - BCDEdit /set PAE forceenable


Of course, if your system didn't meet the requirements shown in that KnowledgeBase article, it won't work.

Let us know if this helped, OK?

Oh, it appears that "BCDEdit /deletevalue PAE" should remove the command, again, at the Admin level.

Edited by JohnWho, 27 May 2007 - 02:03 PM.


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#3 JohnWho

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Posted 27 May 2007 - 02:09 PM

Here's a list of the "BCDEdit /set" parameters - BCDEdit /set .


I notice that it says that PAE is automatically enabled when DEP is enabled on systems that support DEP.

Perhaps you should make sure your system has DEP enabled to see if you are getting PAE and access to that additional RAM.


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#4 DJBPace07

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Posted 27 May 2007 - 03:37 PM

Be careful when enabling the PAE with a Creative soundcard. It may work fine for a while but, if you use the X-Fi series, you will quickly encounter problems such as blue screening, cracking sounds, hissing, or (as I did) a high-pitched siren-like sound that doesn't stop until you restart the computer. I can't wait until Asus releases their new soundcards, then I'm ditching Creative.

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#5 hemantonpc

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Posted 02 June 2007 - 01:01 PM

Hi John,
Hi Djbpace07,

Thanks for guiding me,

and


Sorry for my late response,

I'm confused about one thing,
is PAE is used only when u Increased your RAM
I hear that PAE speedup little bit your PC,is this true??
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#6 DJBPace07

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Posted 02 June 2007 - 02:46 PM

It will speed up your system in the way that extra RAM would. PAE is best used when you have a 64-bit processor AND Operating System (Such as Windows XP Professional 64 or Vista 64) along with 4GB or more of RAM. If you meet all of these items, you can go into the BIOS on your motherboard and enable it there. Windows will see the additional memory and be able to use it. Keep what I said in my previous post in mind before going ahead with PAE, Creative's X-Fi card will not work correctly. I'm not sure if other hardware has the same issues but aside from my soundcard messing up, everything worked normally. If you are using a processor that is 32-bit, you can enable PAE as John described but it's relatively useless there is 4GB or more RAM installed.

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