This is on an ASUS Maximus Extreme X38 w/ an E8600. I can't seem to break the Prime95 (two workers) long term torture over 4.4 Ghz, I'm at 1.296v according to CPUz. Windows itself is stable at 4.6 Ghz at that voltage. Temps at 66c max (load), 44c idle. OCZ Vendetta DHP cooler. Would raising the CPU PLL voltage help? What should I set it to? I get almost identical results using 10x, 9.5x, 9.0x & 8.5x multipliers. The board seems to have a 530 or so FSB cap. So far, I haven't messed with the NB voltage.