Recommend a Platinum PSU

http://www.newegg.com/Product/Product.aspx?Item=N82E168...

^ +1

The following PSU operates in fanless mode until the power draw exceeds 228 Watts.

CORSAIR AX760i 760W Digital ATX12V / EPS12V SLI Ready CrossFire Ready 80 PLUS PLATINUM Certified Full Modular Active PFC Power Supply

http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Review: http://www.hardwaresecrets.com/article/Corsair-AX760i-P...


There's also the CORSAIR AX860i 860W Digital and CORSAIR AX1200i 1200W Digital if you're looking for more power.

http://www.newegg.com/Product/Product.aspx?Item=N82E168...

or the corsair ko888 suggested or these 2:

http://www.newegg.com/Product/Product.aspx?Item=N82E168...

or this:

http://www.newegg.com/Product/Product.aspx?Item=N82E168...

cheers