Phoronix posted a review on the ePower XScale 570W (EP-570MP) power supply

OCZ Technology has been near the top of the power supply hierarchy for quite a while now. Nevertheless, it is a well-known fact that they, like most manufacturers, do not actually make their own units. OCZ Technology uses Topower's as their OEM supplier. Some of the other companies that benefit from Topower include Athena Power, Globalwin, BeQuiet, Aerocool, and ePower. Today we have ePower's Silent Engine 570W PSU for review and it uses Topower's power supplies.

ePower XScale 570W (EP-570MP) Review