well i found out the over volting thing if you enable it it means for instance you set your core at 1.3v and enable the overvolt offset thing it will go to 1.5 volts

i think it might be just enough to get me prime stable at 2.8 ghz with each bump in voltage its lasting longer

although core 0 gave out 18 mins into it the other one was churning away for 33 mins before i noticed there was any errors so i have restarted the pc into bios and upped the core another notch see how it helps me