Before I switched from simple core Athlon64 to dual core Athlon64 I had no idea of this gaming problem, so I had to do some research to find out that it can be solved with a driver from AMD. This problem appears on some games like NFS Most Wanted or FarCry and is very annoying. Your character or car goes crazy performing moves faster than normal. You cant really play in this mode.
A partial solution to the problem is to set the program compatibility mode to windows 98( right click on game’s exe > properties > compatibility > check “run this program in compatibility mode for:” and select windows 98 ).
This did the job for some time but the problem started to reappear. That’s when I found out about the driver for dual core processors from AMD. After you install this driver the problem is solved definitively. Click the link AMD dual core driver to download the driver.