This is great psu. If you decide to overclock the cpu, however, please do not do it with its factory default cooler. Get at least Cooler Master Hyper 212 EVO, it is only 30 bucks, and this will enable you to clock without overheating. At least if you dont go crazy and try to achieve 5 ghz. As for the gpu on your nvidia, I dont recommend overclocking it. You likely wont gain much, if anything, but your temperatures will skyrocket, and stability will be worse. Either get a new card or dont do anything about it.