Efficiency
We don't want to make too many direct comparisons between test results gathered from The Beast because each PSU was run under different loads corresponding to its individual specifications. However, efficiency is important enough to make an exception. Here we've graphed the efficiencies of each PSU at 50, 75, and 100% capacity to see how they stack up against each other.

PC Power & Cooling is the undisputed king of efficiency, taking the top spot in each load test, and always by at least a full percentage point. Corsair and Seasonic round out the top three overall, followed closely by Antec's EarthWatts.

A few PSUs stand out at the back of the pack, too. The GameXStream finishes in the bottom two three times, and the Infiniti falls to last place twice. Fortunately, there really isn't a huge gap in overall efficiency between the best and worst of the lot.