Since it's quite difficult to determine at a glance which power supplies are the most efficient (especially on shopping websites), I've decided to create a list of all power supplies that are 80 Plus Gold certified (I'll add Platinum when those PSUs are released too). According to the 80Plus.org website, an 80 Plus Gold power supply has the following efficiency characteristics: 230V: 88% at 20% load, 92% at 50% load, 88% at 100% load 115V: 87% at 20% load, 90% at 50% load, 87% at 100% load An efficient power supply is often a good choice, since it wastes less energy as heat, keeping your computer cooler and your electricity bills down. The following PSUs are 80 Plus Gold certified: Antec High Current Pro 1200W BeQuiet Dark Power Pro P9 Series - 550W, 650W, 750W, 850W Coolermaster Silent Pro Gold Series - 600W, 700W, 800W, 1000W, 1200W Corsair AX Series - 750W, 850W, 1200W Enermax Pro87+ Series - 500W, 600W (not modular) Enermax Modu87+ Series - 500W, 600W, 700W, 800W, 900W NZXT Hale90 Series - 550W, 650W, 750W, 850W, 1000W Seasonic X-Series - 400W, 460W, 560W, 650W, 750W I will be updating this list as I go along. Please post in this thread if there's an 80 Plus Gold consumer power supply I've missed off. I hope you guys find this thread useful!