Anyone ever run into this issue? e6400 conroe on windows xp. all of a sudden it's calling it out as a single core in task manager. Can't set affinity or anything. Only has one cpu graph in the performance tab as well. but it shows two cores in device manager. Evga offered pretty much no advice on the subject. But I'm really not sure if it's the processor or the mobo causing the issue. I'm leaning toward the processor though, since it's always overclocked like crap. so far I have tried uninstalling them in device manager and letting them try to reload apon reboot. I have reformatted my pc and done a clean OS install. I have reset cmos by taking out the battery and rebooting. I have flashed bios to the most recent. any advice is always welcome.. thanks again XD..