Is that right, Gurusan? I read somewhere that they said no more than 1.3625 max voltage, which is in line with what HDCHOPPER said.

Just for fun I'm currently underclocked. I am at 2.56GHz on 0.968V. This maintains a decent RAM speed over DDR1000 and the machine is still fast! It's way quicker than my old AMD 4800+ X2 at 3.00GHz. I ran Prime and the highest temp for each core reached 30/35. Does Pi 1M in 18 seconds. For comparison, my friend's Q6600 takes 21 seconds at stock.

Any less than 1.00V set in BIOS and the machine won't boot.