The basic aim of the testing was to take a whole bunch of the most popular power supplies on the market today and test them to their stated limits to see just what units would stand up to the torture. The HEXUS standpoint is that a power supply should do what it says on the box, as a sustained output power. If you see said box in a shop, you should be confident that the figure for power on the box can be obtained as a load power output. Advertising a peak output power does nobody any good, especially if the sustained output power isn't anywhere on the box or in the literature. What use is advertising to someone 500W or more, if the supply is capable of around half that under sustained load, often with poor rail regulation and lots of generated heat?