Performance, reliability, and the convenience of modular cabling for basic system upgrades CX Series Modular power supply units are an excellent choice for basic system builds and desktop PC computer upgrades, offering high reliability, low noise, and the flexibility of modular cabling. Low noise 80 PLUS Bronze certified efficiency and clever fan design allow for little or no detectable fan noise during regular operation. Faster installation and better-looking builds The modular cabling system lets you use only the cables you need. You get to save space and reduce clutter for a cleaner-looking build and improved airflow. Reliable and compatible CX Series Modular is built and tested to strict standards for trouble-free installation and smooth operation. Good looks The matte black finish, b...Efficiency: 85%Number of Fans: 1Modular: YesInput Voltage: 120 V ACInput Voltage: 230 V ACNumber of +12V Rails: 1Output Voltage: 3.3 V DC @ 25 AOutput Voltage: 5 V DC @ 20 AOutput Voltage: 12 V DC @ 45.80 AOutput Voltage: - 12 V DC @ 800 mAOutput Voltage: 5 V DC @ 3 AOutput Power: 550 WForm Factor: InternalHeight: 5.5Width: 3.4"Depth: 5.9"Weight (Approximate): 7.21 lbPackage Contents: CX550M Power Supply Modular Cables Green Compliant: YesGreen Compliance Certificate/Authority: 80 Plus BronzeGreen Compliance Certificate/Authority: ErP Lot 6Limited Warranty: 5 YearPackage Contents CX550M Power Supply Modular Cables "