its the 8800 gts g92 by evga.the monitor im using is a 22 inch asus monitor with 2ms and 60hz. changing resolution or any settings makes no difference. What i am finding is that if i do twice the refresh rate the shuddering goes away. So if i get 120 or more fps with v sync off im good but i cant get that in all my games. Could it be my mouse, im using a cheap dell mouse that came with my freinds computer.