I recent brought my i7 PC set, MSI p55 GD80 and corsair dominator 4GB CL8 DDR3-1600

P55 do not support DDR3-1600 without overclok the board (max till 1333 onli) so wen i plug in the RAM it show onli 1333 which max support of the board. In order to use 1600mhz i overclok the board and now it appear 1600mhz does it need to set the voltage as well????

My theory was:-
the RAM is 1600mhz, then by default the voltage spec should be at 1600mhz voltage speed right? (1.65v)
The way to overclok RAm is increase the speed clock and voltage correct?

question is... i made the mobo work the RAM at 1600mhz correct or not??
if is not, what will happen?

in other case like "if" i overclok the ram without setting the right voltage, wat will happen? random crash?

if i remember correctly, those non-high performance ram (under 1600mhz) are 1.5v or 1.55v, correct me if i was wrong