PSUs are one of the most essential but least understood components of any computer system. We thoroughly tested six 700W to 850W PSUs to discover exactly what you should let near your expensive components and the results proved somewhat surprising.
"700-850W is towards the upper end of the performance mainstream sector, where people need the power to run the latest dual core CPUs as well as a couple of hard drives and high end graphics cards, possibly in a multi-GPU arrangement. Each of the PSU's power rails was loaded at 50, 75 and 100 percent to test if it could sustain what it said it was capable of. While the PSUs were under load, temperatures were also taken to determine how well they were keeping cool as they reacted to the sustained load."