Well, according to what I've read, the maximum wattage one of these will consume is 182W. So, I'm guessing that means two will consume 364W at the most. So, I guess your PSU should be okay, but then if that's true, then it depends on how many amps these will consume in SLI mode. However, it says one requires 36A on the +12V rail, so does that mean SLI mode will require 72A at the most?