PSUs are guilty until proven innocent in that a PSU/platform is presumed unsafe until proven otherwise, and I've yet to see a reviewer take apart this unknown platform manufactured by Guangdong Soohoo, also a manufacturer unknown for making quality PSUs. It may in fact be efficient -- though the manufacturer seems to be playing fast and loose with the 80+ given that the GP 550 itself hasn't been certified -- but without any information on the quality of the internal parts otherwise, I cannot recommend it.