The Coolmax JD-550-M-500 M-500B 500W ATX 12V Power Supply is a reliable and tested product designed for computer systems. With its ATX form factor and 20+4 pin connectors, this power supply is compatible with a 12V system voltage. The maximum power output of 500W ensures that your computer components receive the necessary power for optimal performance. The Coolmax brand is known for producing quality electrical components, making this power supply a dependable choice for your computer setup.