The Cooler Master Game Xtreme II is the 2nd generation of the extremely popular Game Xtreme PSU series. The new GXII PSUs have been tweaked and come with a quiet HDB fan & nonstop USB power. The nonstop USB power lead enables power to the USB ports, even when the system is turned off. The 650W model is an excellent choice and it's affordable, 80 Plus certified, has a single +12V rail & comes with a 5 year warranty.