PWS-920P-1R Supermicro 920W 1U Redundant Power Supply
[PWS-920P-1R]

5 of 5 Stars I bought the PSU as a replacement for a Supermicro SC846 (24 disk) chassis which I was commissioned to repair. Tekmart was actually very quick with getting the PSU delivered out on time. I had tried the normal 900w ones which were *very* loud and then went to the 720w which under light loads or until it had been running for a while was very quiet. I upgraded to this 920W model which is much higher efficiency. I saw a 60w decrease in power usage from the dual 720w PSU model (half of decrease is probably due to the extra power being used in a dual PSU configuration). My setup works perfectly and now the system is ok! This new PSU has more ramp up options and even at high load it is LOADs quieter than the 700w ones were during heavy load and MUCH MUCH quieter than the 900w ones were even when you first turn them on. Shipping was easy to track. Thank you guys.