Okay now im with ASRock 880GMH/U3S3 and AMD FX 4100 4x 3.6ghz. The default voltages are: CPU Voltage 1.4125 ; CPU NB Voltage 1.2500. I read that people overclock the processor to 4.5 - 4.6ghz without increasing the voltages. Now I clocked it to 4.2ghz and the CPU voltage is 1.5000 even a step back and I stress tests fail! My question is what are the voltages that I should not go beyond with this processor. ( I control the Tempetarutres and they are good ) Cause Im still new in Overclocking I also don't know if just the CPU voltage increasing is enough when going over 4.2ghz. But the main question is what voltages I can reach with no fear... for this processor. Thanks for your time!