OCZ hasn't been in the Power Supply game as long as other people, but they've been at it long enough to get a few things right. The OCZ ZX Series 850W PSU is hands-down the best power supply I've ever tested. The voltage rails are solid. The ripple and noise on this unit is incredibly low. I retested and recalibrated my scope in order to make sure it wasn't malfunctioning. It wasn't. The PSU is simply that solid. . .
