"The OCZ ModXStream Pro 600W tested out to be a good power supply. It produced good voltage regulation and delivers excellent efficiency. In addition, the ModXStream does its job very quietly, is 80Plus and NVIDIA SLI certified, and comes backed with OCZ's PowerSwap warranty. On the down side, the DC outputs were not as clean (AC ripple) as we have come to expect from OCZ and PC Power & Cooling. And the 3-Year warranty goes along with the lower price point."