In my 3600X2 @ 2850Mhz, 2Gb DDR2, X800GTO2, it runs fine in 1440x800 with everything on max, except world shadows and FX, which are in Medium, no AA or AF. And it runs at MIN 25 FPS
At 1680x1050 I have 20 FPS Min and its playable, but I enjoyed better 1440x800.