1.5 gig showing only 1 gig?

vip3569

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Jul 1, 2007
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I was currently running an athlon 64 3000+ with 1.5 gigs of ram on a msi neo Kn8 4 just fine. I just upgraded to an amd 64 4000+. After the upgrade, windows xp can only detect 1 gig of ram, no matter which slots I put the ram in. Thanks for the help.