I'm replacing a 550W Diablotek I bought about a year and a half ago.
Gigabyte HD 6850
Athlon II X4 640 OC @ 3.6GHz (from 3.0)
10GB Ram (2x3gb + 1x4gb)
Cooler Master Hyper 212+
500gb HDD (1)
This case: http://www.newegg.com/Product/Product.aspx?Item=N82E16811156063
Has: 2x80mm, 2x120mm fans
What do you think? Do I need a 600W or would I be alright with a 550?
Tom's March 2011 value buildhttp://www.tomshardware.com/reviews/budget-gaming-pc-phenom-ii-radeon-hd-6850,2903.html
Overclocked PII X4-925 / HD 6850
306 watts from the wall running Prime and Furmark combined
~84% efficient 380 watt psu
~257 watt DC load on the psu when running a pair of power viruses intended to simulate MAX load, not the kind of power consumption you're going to see unless that's all you do
Buy what you want, just know that a good quality 500 watt psu isn't the "bare minimum"