Below is a link to one of the best online vendors there is. You decide which to get. $60 isn't quite enough for that capacity in one of the top shelf brands. There is a XION unit listed that I have experience with the brand and it seems dependable. Read the reviews as well as the amps on the various rails.
Why do you need 650W? Most people don't come close to needing that much. Are you running dual video cards & multiple HDD's? Either spend a little more & get something decent or get a lower wattage unit. Amperage on the +12v is what's important.
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