With some of my boards you literally have to type 1.5 (or what ever voltage you are after) into the ram voltage selection box as there is no drop down menu or anything, it's really counter intuitive.
Tried that mate but nothing. I am thinking of getting a cheap board off the MP to tide me over till new build time. Though I might add it has not froze once to day and I played a bit of Black Ops 3 which hammers your RAM seemingly, froze three times yesterday doing nothing.