that seems weird. i dont know much but it could be driver issues, a defective card or your cpu is holding you back since rts are more cpu intensive.
Well, I've got an Athlon X2 5600+ (65W) Dual Core in my system. I've considered that as a possibility. I've got more troubleshooting to do. The drivers in use are the 9.8 catalyst under Windows 7 and DirectX 11. I am going to try pushing Far Cry 2 to higher settings to see at which point that game lags. I'm limited to 1440x900 due to having a 19" samsung lcd.