Running x64 retail on a custom build: Core 2 Duo @ 3.0 ghz 2 gigs crucial ballistix GeForce 9800 GTX+ (512 MB) MSI P43 Neo motherboard Not the issue people are thinking. I have 2 gigs of Ram installed and under system properties is shows Installed Ram 3.0 GB (2.0 usable), DXDIAG shows 3 gigs installed, Nvidia control panel shows 512 GB on the vid card which is correct and 1286 total usable video memory. A friend of mine has 1 gig installed and windows reports 8.0 GB (1.0 Usable) Any ideas? I know about the memory remap/memory hole setting - which my mobo does not have listed in the bios. Not sure if that would even correct this issue.