Hi mates, I overclocked my i5 3570K to 4.2ghz, I only changed to 4.2ghz in the bios with auto voltage, saved & exit!
Running Prime 95 (Blend test) for 15 Hours till now, monitoring voltages by Cpu-Z and Temps by Real Temp GT 3.70
Voltages are between 1,014V - 1,116V
Temps are between 51-57C...