When I start to play some intensive programs like BF4 or running multiple programs at one time my computer black screens. When I turn on my computer now it will not boot up and the CPU or GPU fans will not spin. I have a 4.2ghz OC on my 2500k which has worked flawlessly for 3+ years. In the last months this has happened. It stopped doing as much when I upgraded my GPU to a 670 from a 560 ti, and when I cleaned out the CPU cooler. Do you think I need a new motherboard or just to down clock my CPU if I can ever turn it on. Waiting for it to cool down (if that is even the problem) as I am writing this. Thanks.