@slovnaft,that what i was talking abouton the volts(vtt,pll) if i try anything lower at fsb above 430 no boot.this is with e8400 and my e8500.at 430 fsb i can set vtt@1.2,vnb@1.2 and it boots right up. the when i up the fsb to say 438 no boot oc failure. then i try vnb@1.22-1.30,and vtt@1.2-1.4 no boot. have to set at least 1.42vtt 1.3 vnb.and pllhas to be at 1.57or above