The Antec CP-1000 features a unique design with an advanced cooling system, compatible with some of Antec's most cutting-edge Gaming and Performance One enclosures, including the Twelve Hundred, P183 and P193. By breaking the mold of standardized power supply size restrictions, the CP-1000 design is able to provide an excellent price-to-performance ratio. A silent rear 120mm PWM fan and dual PCB layout also ensure optimal cooling performance and reliability. Fans: Quiet 120mm PWM cooling fan Main Connector: 20+4Pin +12V Rails: 4 PCI-Express Connector: 2 x 6-Pin, 2 x 6+2-Pin SATA Power Connector: 12 Efficiency: 80% or more Over Voltage Protection: Yes Input Voltage: 100 - 240 V