"The NZXT PP600 & PP800 Power Supplies offer great performance, but the PP800 does outperforms the PP600. The PP600 is a great Power Supply for a mid-range gaming computer build. The PP800 on the other hand is very capable because it's NVIDIA SLI certified. The PP800 if best suited for a high-end gaming rig. If I had my choice I would go with the PP800. Watch the video to find out more." ~3dGameMan.com