The PSU is a Rosewill Performance 600W Power Supply RP600V2-S-SL in which I have only owned for a few months so would like to keep and get more use out of it and I own a AMD HD 7870 at the moment but want to upgrade to AMD R9 290. Btw I do not over clock and do not plan too either and my pc has an AMD FX8320 CPU if that helps. I know there's better power supply's but just want to know if the one I have is fine for that GPU thanks.