Psu.

Pc Power & Cooling

Pc Power & Cooling Turbo-cool 1 Kw.
Pc Power & Cooling Silencer 750/ 750 Quad.
 
prob need something closer or more then 600 w
Why, are you planning on SLIing them? The official recommendation from nVidia is a 400W PSU with at least +12V@26A. Either of the units I recommended are more than sufficient. In any case, the amperage on the +12V line is more important than the total wattage. Comparing the units in that regard:

Xion 600W: +12V@30A
Ultra X-Finity 600W: +12V@35A
Enhance 5150GH: +12V@36A
Corsair HX520W: +12V@40A

Pc Power & Cooling Turbo-cool 1 Kw.
Pc Power & Cooling Silencer 750/ 750 Quad.
budget preferably under $80
 
Overall (IMO):

Highly recommended:
1. Corsair HX520W. This is a very, very good PSU.
2. Enhance 5150GH.

Others:
Ultra X-Finity - Not a bad PSU, but the Corsair and Enhance are better
Hiper 580W - Also not bad, but with only +12V@30A it doesn't really compare with some of the other units
Rosewill 600W - The quality of Rosewill PSUs isn't that high, particularly at this price-point.
Xion 600W - The quality's not great, and it focuses far more on the 5V rail than the 12V.
 
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