A:Answer I just upgraded the power supply on this myself last week. I upgraded to a Corsair CX750M 80 PLUS BRONZE Certified. There's plenty of room in the case for really anything you would get under 1000W, so you should be good to purchase whatever you would like. I would recommend either Corsair or EVGA brand, bronze or gold certified, and then whatever wattage you would like (I really like my 750W). There are other good brands but this is just my input. Feel free to ask me if you need any advice on the upgrade!