I currently have a 500 watt I am wondering what I should upgrade to. I am thinking 750-850 watt. What should I look for to make sure it's a good one? I'm leaning to EVGA brand. Recommendations? Current CPU is FX6300 and a 750 oc 2gb. MoBo is GA-78lmt-usb3 6.0. I will upgrade the GPU first then MoBo and CPU later.