This is a big brother of the 400W model, also being very quiet in operation by using an intelligent thermal sensor controlled 12 CM silent cooling fan, no noise pollution especially when used at silent night, it featuers a high efficient true 500W output for Intel Dual Core/AMD extreme, SLI/PCI express ready ...(othet main features stay the same as Fortune Tec Silent Power 400W) and with additional (6 pins) PCI power connector for the "hungry" PCI cards you may have, Fortune TEC silent 500W will constantly deliver smoothly the energy to your high performance system.