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Pae?


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#1 gnrrocks220

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Posted 22 May 2006 - 05:30 PM

I recently built a new system. I've heard that PAE (Physical Address Extension) lets Windows XP 32 bit support up to 4GB. I've also heard something about the memory mapping not letting it go past 3GB.

Currently I have 4GB of RAM installed in my system, but Windows only recognizes 3GB. When I enter BIOS it says "Installed: 4GB, Usable: 3GB."

Why is this, and is there any way to allow the last GB to be used?

By the way, I'm Eric. :thumbsup:

Edited by gnrrocks220, 22 May 2006 - 06:50 PM.


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#2 Albert Frankenstein

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Posted 22 May 2006 - 05:34 PM

Welcome to BC! :thumbsup:

XP Professional or Home?
ALBERT FRANKENSTEIN
I'M SO SMART IT'S SCARY!


Currently home chillin' with the fam and my two dogs!


#3 gnrrocks220

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Posted 22 May 2006 - 06:49 PM

Pro, and thanks for the welcome.

#4 Enthusiast

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Posted 22 May 2006 - 08:06 PM

Some motherboards will not allow more than a certain amount of RAM.

You may find the information on the following Microsoft page helpful:
Memory Support and Windows Operating Systems
http://www.microsoft.com/whdc/system/platf...PAE/PAEmem.mspx

#5 gnrrocks220

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Posted 22 May 2006 - 09:22 PM

Some motherboards will not allow more than a certain amount of RAM.

You may find the information on the following Microsoft page helpful:
Memory Support and Windows Operating Systems
http://www.microsoft.com/whdc/system/platf...PAE/PAEmem.mspx

So is there nothing I can do to use that last DIMM? I have the Asus A8N 32 SLI Deluxe, BTW.

#6 Enthusiast

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Posted 22 May 2006 - 10:24 PM

According to Asus support the motherboard supports 4GB RAM

Memory
Dual channel memory architecture
4 x DIMM, max. 4GB, DDR 400 / 333 / 266, ECC, non-ECC, un-buffered memory
* Refer to www.asus.com or user manual for "Memory QVL (Qualify Vendor List)
http://usa.asus.com/products4.aspx?modelme...=3&l2=15&l3=226

#7 Enthusiast

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Posted 22 May 2006 - 10:26 PM

Do some tests to make sure all the RAM is good.

RAM tests

http://www.simmtester.com/page/products/doc/download.asp
http://oca.microsoft.com/en/windiag.asp
http://www.memtest.org/
http://www.memtest86.com/




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