bit-tech published a 900W to 1100W power supply group test
None of the PSUs we've looked at are perfect, even the recommended Tagan comes short by not including the 8-pin PCI-Express connectors and as stated, even the perfectly featured Enermax is "noisy", heavy and physically huge. Virtually all the tests performed extremely well with only a couple of cases dropping outside of ATX spec and the OCZ at 100 percent load falling below 80 percent efficiency.900W to 1100W PSU Group Test