Last night I set voltages all over the place trying to get FSB 450 and CPU multiplier 8.0 I would suspect that I should be able to do this with this CPU. At a multiplier of 7.5 all was well. After I bumped it to 8 for 3.6GHz I kept getting prime errors anywhere from 1 to 13 minutes. Currently FSB termination voltage at 1.3 and CPU pll at 1.56 NB 1.35 I've varied Vcore over a wide range and it didn't seem to help. Even had it up to over 1.3635 (set in BIOS) and that didn't help. All of the errors are in core 0 and 1. Dram frequecy is low and timings are relaxed in order to isolate CPU. More Vcore or other? Any suggestions to improve stability?