Add a high performance, energy efficient 530W power supply to an ATX computer 80 Plus certified power supplies ensure that minimal power is wasted, & PSU efficiency exceeds 80% to reduce heat output, increase system reliability & reduce energy costs Active Power Factor Correction improves voltage stability & provides environmentally friendlier power usage Quad 12V rails providing dedicated voltage outputs & circuitry ideal to advanced systems & server with multiple sensitive components This 530 Watt Power Supply is 80 Plus Bronze certified, providing stable power while balancing maximum energy efficiency. Compliant with ATX12V 2.3 standards, this EPS12V 2.91 power supply offers four 12V power rails, two 6-pin PCI Express connectors & an 8-pin EPS connector. A versatile power solution, the PSU is suitable as an energy efficient replacement/upgrade power supply for desktop PCs, & features Active Power Factor Correction & 20/24 pin motherboard support to deliver the flexibility needed to support AMD or Intel CPU-based entry-level servers & high end work stations. To encourage re-using your existing PC power cord as a new environmental initiative, a PC power cord is NOT included; however if you require one they are available as an optional accessory. Designed to provide dependable, long-lasting power, this higher level 80 Plus 530 Watt ATX12V 2.3 EPS12V Computer power supply meets or exceeds 80 Plus Bronze standards, providing 82% or greater efficiency at 20%, 50% & 100% loads & is backed by Star Tech.coms 3-year warranty. What&8217;s in the box 530W ATX12V 2.3 Computer Power Supply Instruction Manual