i am not sure that is even the correct term, over volting. I am looking to pick up an 4650k, and stock it runs DDR3 1600 RAM, if i want to run faster, the RAM can not be the stock 1.5 volts. I know nothing about OC'ing ram, and voltage. Any OC'ing i did was messing with multipliers on the CPU. Any advice? Can I just purchase a capable mobo and somehow select 1.65 volts as an option ? I do not ppost often, id call my skill level slightly better than novice.