Seasonic S12 330W, 120mm Power Supply
 

Seasonic is known for its power supplies being special because of a single reason; efficiency. Seasonic is one of the only companies with power supplies that have the typical efficiency draw of up to 80%. Mostly all other power supplies today come with a typical rating of 60%. So the Seasonic power supplies use only the amount of wattage it needs and will save you cash.

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[M] review 500 Watts - http://www.madshrimps.be/?action=getarticle&articID=328