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Ok, simple question, plz stick to it. Even with PAE enabled, M$ has artificial limitations, and even more in sp2-3. So its not a technical or architectual limitation (there are patches for vista & 7 32bit).

So, does anyone have that patch?

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closed as off topic by Ƭᴇcʜιᴇ007, 8088, random Dec 8 '12 at 4:27

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It's a licensing limitation for XP. You can't get around it with a patch. With Vista and Windows 7, it's a technical limitation (as the 32-bit and 64-bit editions use the same licenses).

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As far as I know, the patches for vista and 7 "hack" the kernel. So the patch for xp is somewhere out there. – vampm Dec 8 '12 at 0:18

As far as I am aware, your hardware has to support the PAE. So the processor and motherboard would need to support using PAE. Microsoft acknoleges this publically on their website. and here

I've not been sucessful getting PAE to function and add memory past 3.5GB on any of my XP x86 machines.

Interesting that David mentioned it being a licensing issue. The second link basically concurs with this, but at the bottom of the page the information contradicts that. Though I think addressing memory above 4GB is limited to non process related tasks like memory sharing with video cards and RAM disks.

But sorry no, I don't have a "patch". Though it looks like on the first link they give you the commands to enable it. Might be worth doing some reading and figuring it out.

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No problem! Of course the hardware must support it (all harware 5 yo support it). As far as I know, PAE, by itself, inst doing much (it does but) because there are these limitations of M$ in xp. in Linux, pae works just fine: And I cannot test PAE in xp yet; I ll have a new pachine in 3-4 days with 8gb ram, so then I am going ot tell more about this. – vampm Dec 8 '12 at 1:33
The windows 7 patches make PAE support act like PAE on windows datacenter by modifiying the kernel. So even though it is a licensing issue it can still be done also .. since windows XP pre sp2-3 could use PAE to some extent that could probably be patched back in. – cb88 Jun 5 '13 at 19:00

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