Max res 1920 X 1080. Any gaming can be run at reduced res and settings. Actually, this particular computer is not used for gaming. Its the wife's. Q6600, 4 gig DDR2 800. Its actually an ASUS SLI board but I'm thinking even an HD 5450 would outperform an 8500GT. Let's say $50 USD. I see 5450 for 45.