Anort, I don't know how they got that list, but the PSUs are all way to high. You'll be fine with the listed PSU. Tom's said its around 300W. Which matches what you'd get from the PCIe socket/plugs. (150W from 8pin, and 75W from 6pin and 75W from socket.) Add in another 100W for CPU and you are looking at less then 400W for the biggest 12V power draws. That 550W will be fine.