what the offset does, is to give you a Vcore range, and you adjust it at your own taste. for me the Vcore (in BIOS) was 1.28. if you let everything at stock and boot into windows and start monitoring the voltages, you will see that when your CPU goes under load, the Vcore starts climbing up (0.904 -> 1.25 for me, with power savings). If you are in need to go further, just add some values in the BIOS. Example: you want 1.4v under load - go into BIOS and in the offset voltage set a value like +0.12. what this does is add extra voltage to the reference voltage stated at the beginning, meaning your final voltage will be 1.28+0.12=1.4v under load (this may be not so linear, but its an idea of how it works). if you set the voltage to fixed mode, the BIOS locks the voltage to a certain value. if you input 1.4v there, the voltage will remain fixed at 1.4v no matter what load you throw at the CPU (0%load = 1.4v, 100% = 1.4v) even with power savings enabled. I don't like this because you will see the difference in the electricity bill + shorten the lifetime of the CPU. one last thing is, the setting on the Turbo Boost setting. it has a setting to bump the CPU voltage when the turbo kicks in. mine is on auto, and it seems to give around 0.01/0.02v more than the voltage from the offset, but i might be wrong. for what I have experienced so far, this is what i can tell. if I am wrong, please let me know!