I assume you're not running a BIOS that supports the chip. Check what BIOS you are currently running. Then go check if that BIOS has official support for the 930. If not update to the new one that does. You should then see four cores in the BIOS. If they are still not in windows I would do a clean install. Before you do that though you could try the msconfig/device manger route. Also burn a live linux cd in see if there are four cores.