Thanks bingo13 for the F3B bios, I can know boot att 265*11 with NB speed around 2gz+ Working on getting my rig prime stabbel know, Do know know why 3 cores is prime stable at 1,36-1,45v @ 2750 but not the all four? could it have to do with the nb running to high speed? Testing 1750nb\htt know will post results with higer clocked cpu this weekend to!