The used Dell J6J6M 550W 80 Plus Silver Power Supply is a high-quality power supply unit designed for Dell PowerEdge R420 servers. It delivers 550W of power, ensuring reliable and efficient operation of the server. This power supply unit has been previously used but has been tested and certified to be in good working condition, making it a cost-effective option for those looking to upgrade or replace their existing power supply unit. With its 80 Plus Silver efficiency rating and dependable performance, the Dell J6J6M power supply unit is an ideal choice for powering your Dell PowerEdge R420 server and ensuring uninterrupted operation and data processing.