depends on what you want to spend, are you using this for gaming, all that stuff. if you don't plan to game at all the igp on the cpu is good enough for you and you can just get a corsair 430watt i guess, if you plan to game you will need a gfx card, and if on high res (1080p/i) then you'l need a good gpu, which'll run you close to 200, and need a 600 to 650 watt psu.