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Windows 3gb-4gb Memory issue.


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Hey all! I just purchases 2gb of ram for my computer on top of another 2 gb's that I already had.  I checked and both stick work however windows only registers 3gb of ram.  I've been reading some troubleshooting stuff on Microshaft and some forums but I haven't found a definitive fix.  So i was hoping you all could help. thx in advance

OS: Windows XP Home 32-bit

Motherboard: Asus P5B (it supports up to 8gb of ram)

Ram: 4gb Corsair Xms2 DDr2 800 (5-5-5-12 timings)

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A thread on the same issue. Someone was discussing turning PAE on? I never don't know what that is(I think they meant Physical Address Extension), but maybe it would help: http://www.neowin.net/index.php?act=view&id=42757


Says windows can use 4gb of ram(on 32 bit XP) by default.

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Windows System info is showing 4096 mb total (correct memory amount).  Windows general tab is showing 2930mb and dxdiag is showing 3008.  I think im just gonna pick up a  copy of xp pro 64 bit edition and skip the PAE hassle. 

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Is anything sharing the memory? Like Graphics card, etc..

It might be using all  4 gig but sharing some with another device.



I have 2gig of ram, but it only shows what is available to windows because my graphics card is using the rest.

You need a 64 bit capable processor to run x64

System requirements

Supported processors: AMD Athlon 64, AMD Opteron, Intel Xeon with Intel EM64T support, Intel Pentium 4 with Intel EM64T support

256 MB RAM

1.5 GB available hard-disk space

Super VGA (800x600) or higher resolution video card

CD-ROM or DVD drive

Keyboard and Microsoft Mouse or compatible pointing device


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