Vista Ultimate 64 only sees 3GB RAM - motherboard limitation?

[viivo]

The board is a Foxconn G31AX-K. BIOS and control panel both obviously show the full 4GBs, but dxdiag and game configuration programs only show 3326MB.

I've searched but couldn't find anything on the board. I tried a few solutions like unchecking "Maximum Memory" in the advanced boot options, setting a few settings in the BIOS to 64 bit, etc., but it's still not showing up. Everything on-board is disabled.

Another possibly related thing, Dxdiag says my video card has 2125MB of memory and RSV6's requirements tool shows it as 4096. Very strange.

Thanks for any help or suggestions.

 

[tcsenter]

G31/P31 is limited to 4GB RAM and does not support memory remapping.

 

[eternalone]

Had the same problem different board, updated the Bios, Problem Gone. Update the Bios.

 

[tcsenter]

BIOS won't change silicon.