Hi. I have some strange problem. I sold my previous graphic card and purchased ATI's x850xt. Before pluging it, I removed previous drivers. Then installed the newest drivers from ATI site. But now I'm experiencing some kind of acceleration in all games. E.g., in NFSU2 the car moves twice as fast, in TimeShift main character not moves, but just runs, and its impossible to play. It looks almost the same as with old dos games, when you must to use moslo application to slow down the CPU. But I play not the old games, although everything moves faster than it should. Even with all high quality settings turned on.
I thought it's my card faulty, so removed it with all drivers. Took GeForce EN6600 from another pc, but it not helped

My system:
CPU: AMD Athlon64 X2 3800+
M/B: MSI 09AC
Chipset: ATI RS842

I know some older games I've tried have trouble with dual-cores. Not sure if that's what's happening, but if that's the cause, you can start it up. Ctrl + Alt + Delete, go to the application's process, and set its affinity to only one core.

Not sure if that's your problem, but it's worth a shot.