Hey guys. I've got an EVGA p55v Motherboard with an intel i5 cpu K 655 @3.20GHz. I recently switch from 4gb ram to a 8gb ram. Now here's the problem, after buying the 8gb ram I tried to be a boss and put both 4gb and 8gb of ram together. In the result of it, the computer would crash every so often. I've also tried to just switch from just to 8gb only but now it rarely even starts. It just keeps bugging out on the start-up. I have a feeling it might be that I don't have enough in power supply or that I might need a better cooling system. I have a 600W power supply and Asetek 120mm Liquid Cooling System. Please help. Also I tried to Overclock, I just went on youtube to learn. (clearly don't know what I'm doing)