I discovered I can set the voltage at just under 1.3 and it will accept that voltage so I guess the board limits the voltage and subsequently limits the OC. I ran this 4.0Ghz at 1.25v in BIOS and it seems stable, I was hoping to go higher. If I restart it reverts to auto, but if I restart again it lets me set the voltage and it will allow the voltage as long as it is under 1.3. Anything over and I get a failed OC. Very frustrating. Thanks for the responses and I also tried the + or- and it ends up the same.