A lot of people ask on these forums "which power supply do I get?" A lot of people are building single gpu gaming systems with moderate power requirements and foolishly think they are getting a good deal by getting a $30 500w psu. I can assure you, unless its because of a $100 rebate, it is not a reliable psu. The enhance 5140gh is by most standards budget priced, $54 from ewiz.com and boasts 28amps combined, not too shabby, and for all you people who think that you need 550w of power to drive an x1900xt, read this!
The Link
The Link