Today we're looking at some of the most expensive ATX power supplies on the market. All of these PSUs deliver more than enough power for SLI and CrossFire systems, and the highest wattage units are capable of running tri-SLI with GTX 480. Even so, there are still plenty of differences between the offerings. We'll find out which handle overload situations the best, who has the highest efficiencty, and which PSU provides the best voltage regulation. Based on all of the criteria, we'll try to separate the wheat from the tares and pick out the best choice overall; we might end up with a split decision, however, so let's start by meeting the contenders.

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