Missing RAM


I am running 64-bit Windows 7 RC1, and can access only 3GB of my 4GB of RAM! I’m running an Asus P5B Deluxe with BIOS v. 8.00.12, a Core2 Duo E6600, and four 1GB DDR2 DIMMs. Asus’s website says that my motherboard can go up to 8GB of RAM, so why does it say only 3GB is used? I have taken out all the DIMMs and tested them individually and they all seem to work fine by themselves.

—Joshua Tolhurst

First, you’ll want to make sure that memory remapping is enabled in the BIOS. If that does not correct your problem, you may want to update the BIOS. It looks like your BIOS is a couple of years out of date. Asus has released numerous “beta” BIOSes for the P5B Deluxe that address memory issues like the one you’re having.

SUBMIT YOUR QUESTION Are flames shooting out of the back of your rig? First, grab a fire extinguisher and douse the flames. Once the pyrotechnic display has fizzled, email the doctor at doctor@maximumpc.com for advice on how to solve your technological woes.

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