i have an amd opteron 1381 2,5 ghz quad core cpu and i have asrock 785gm-s3 with the newest bios. The motherboard shows and is able to overclock the cpu up to 2,6 ghz, but after that it becomes extremely unstable, i tried higher cpu voltage but it only a bit. I saw there are more cpu settings for overclocking but i dont know any of those, since they didnt exist before and cant see on any motherboard today. Any Help?