I have a asus p5n-d motherboard. When I set the multiplier to 12 and I don't touch the fsb. So I go in to windows ( the speed is 3.2) and run prime and for like 4 mins its fine. Then the fsb jumps from 266 to 275 and I get 3300. Does anyone know what is going on. I turned off the cpu features in bios. I did not have this problem with evga 750i motherboard.