I thought the corsair XMS 3 ram was supposed to run at 1.65 volts, thats what mine says.
if anything its a dead board or its on the way out, ram rarely causes to many issues, the same with cpu. psu wouldn't cause these kind of issues, but you could try putting cpu under load and checking the rails. try a different gpu, and if the problem persists then id say its the board. unexplainable issues usually relate to a mobo in my opinion