isaac_LNX you need to upgrade video card and most will mostl ikely need a better power supply to run a better card so a 450 watt corsair psu at least and get a 9600gt or 4850 what ever falls into your budget.

the game runs smoother for me in dx10 then using the same settings in dx9 turning on the dx10 only effects do cause quite a performance hit though but the game looks nice running on m 4870 1G at 1920x1200 4xAA DX10 minus the special dx10 effects lol

these pics are very low rez to do a comparizon high rez 1080p screen shots would help

i can run it at 1280x1024 at medium settings with no AA and i get around 30-40fps on my 8800 gts 320mb i can run with no lag high setting no AA if i lower the resolution to 1024 by 768