hey, i saw ur post about the Asus P5RD1-vm u posted in 2006....2006 OMG!long time..
anyways i have the same problem u had described over here
http://forums.techguy.org/windows-nt...display-2.html
the only difference is that i have 7300gt...i have the same problem about displaying only 1.49GB, when playing games it lags, and i am able to access 2GB only when i change my display to onboard video...when i switch to vga i.e 7300gt i suffer the same problem as u had...
so did u get a solution to the problem??/if any views, solution and experience, please do share with me....