Designed to meet the highest expectations and standards of today's extreme PC enthusiasts and system builders while pushing the limit of clean and reliable power, the Toughpower Grand series features smart cable management which not only enables professional looking system builds, but also accelerates air flow through the PC chassis for highly efficient heat dissipation. The 650w Toughpower Grand power supply unit (PSU) features a dual ball bearing 140mm flower shaped fan which enables longer lifespan and lowers overall noise output by dramatically reducing bearing friction. It has a stable continuous output at 50c operating environment and the single +12V rail design provides up to 52A. This power supply complies with ATX 12V 2.3 & EPS 12V 2.91 version and supports quad core CPUs and all multi core GPU technologies, including SLI and Crossfire. The 650w Toughpower Grand comes with modularised cable management to eliminate clutter and improve airflow inside the system housing. The newly designed active PFC circuitry provides higher efficiency during low voltage input and the double forward switching circuitry offers low power loss and high reliability. This power supply has active power factor correction and high efficiency, offering over current, over power, over voltage, under voltage and short circuit protections and safety EMI approvals (CE, TUV, FCC, UL, CUL, GOST and BSMI). This Toughpower Grand PSU uses Japanese made capacitors which promise the best reliability and this PSU is also eco friendly. This power supply has one 24pin main power connector, one 4+4pin ATX 12V connector, one 8pin EPS 12V connector, two 8pin PCI-E connectors, two 6pin PCI-E connectors, eight SATA (5pin) connectors, eight peripheral (4pin) connector, one FDD (4pin) connector and two 8pin to 6pin PCI-E adapters. All of the above combine to make this PSU the Toughest power supply on the block!