And it shouldn't be causing your games to crash or perform poorly. What should happen, is the game is simply unable to utilize the second core, and runs as on a single core.
If your games are crashing or performing poorly, it's likely a result of something else. I'd do the usual, such as make sure all unnecessary programs are not running, services are kept to a minimum, malware and virus sweeps, update to the latest drivers for video and audio cards, update motherboard chipset drivers, that sort of thing. You'll also want to make sure you've got a strong enough power supply for all that high end gear, and that you have adequate cooling.
i need to know how to turn off one of the cores temporarly so i can play some games that have not been patched for daul core processors that crash and or play crappy even though i have well above minimum and recomended requirnments
AMD athlone 64 4600 X2
Windows home editios SP2
XFX nvida GeForce 7600 GT
250 western digital hard dirve
80gb western digital hard drive