I want to buy this PSU http://www.amazon.com/Logisys-Corp-Bearing-Supply-PS550E12BK/dp/B004MU8VCS/ref=sr_1_10?ie=UTF8&qid=1449449900&sr=8-10&keywords=500+watt+PSU to power up a r7 265 and G3258. I will be overclocking. It gives out 550 wattage, but I know that my specs will require little? So Is this okay either way? (Probably only going to overclock the CPU and that's it.)