Well, I got 4.1ghz(actually 4.095 in everest) stable on prime 40 16 hours, 20x195, 1.4125v bios(1.40 actual underload), 1.35 vdram/qpi, 1.6706 Ram voltage, everything else auto.... If I increase vdram.qpi to more than 1.375, core 2, and 4 will fail randomly after 10 hours of prime 95, unless I increase voltage to 1.49! This only happens during the large ffts which usually mean memory issues, but it passes memtest with any setting I choose......