Thermaltake Toughpower XT 850W ATI CrossFire X Certified and AMD Game Ready Core i7, SLI Compliant 80 PLUS Bronze Certified Power Supply- W0224RU FanDelayCool: evolved from high-end projectors cooling system, FanDelayCool enables users to control how long the 14cm fan should continue to operate (up to 30 seconds) after system shutdown S.P.T. Indicator: indicates the standby, PG signal, and temperature status of the power supply 12Vin1: single +12V rail provides the best compatibility for the latest components High Quality Japanese Capacitors provide superb performance and reliability