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  Tom's Hardware Forums » Windows XP » Configuration & Customize » Windowx reads 3gig instead of 4gig RAM
 

Windowx reads 3gig instead of 4gig RAM




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 Thread : Windowx reads 3gig instead of 4gig RAM
 
Profile: enthusiast
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Hi, I bought a pair of 2gig RAMs. I read a lot about it and googled it as well, it helps me under how it works but I still can not get all 4gigs to work. I have a motherboard that supports 8gig, A cpu that has DEP enabled (PAE enable), enabled memory mapping (BIOS see all 4 gigs). I also tried the /PAE in boot.ini it does not work. I know that two gigs is reserved for apps and another 2 is reserved for windows. I am sure there's someway to make windows use all those 4gig RAMS. Please help me thanks

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Profile: enthusiast
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Are you using a 64 bit OS?

Normal 32 bit operating systems cant read 4 gigs of ram.

Profile: enthusiast
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yes I am using a 32bit OS, acutally no you can have your os to read 4gig. The os is reading 3 gig out of 4 gig because of the "the hole" memory thing and its reserved for hardware device and video card and stuff like that, but there is a way to read 4gig.

Profile: Honorary Poster
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Even if you get all 4gigs to display on your OS, it's not likely that any 32 bit application (Sans SupCom) would actually take advantage of all 4gigs.

It's like putting a spoiler on a school bus... it may look nice, but it doesn't do anything. My $0.02 anyway.

Profile: member
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I don't think that 32 bit XP can read over 3GB.

Profile: Honorary Poster
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You can do it with some boot.ini and registry tweaks, I believe, but as I said above... I don't think it gives you any kind of performance boost at all.

Profile: enthusiast
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When you install SP2, even the /PAE switch wont allow that much RAM to be used

Profile: Honorary Poster
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Yeah, I don't know if he understands that though. After the hardware takes it's share (especially the video card if it's a 512MB or higher) will leave him in the 3.5 range.

Profile: stranger
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install a 64 bit OS my system reads 3.25 gb in XP 32


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