The Coldwatt Supermicro PWS-651-1R CWA2-0650-10-SM01-1 650W Server Power Supply is a high-quality hot-swappable power supply unit designed for server components in enterprise networking systems. Made by Coldwatt in the United States, it is specifically compatible with Supermicro servers and has a maximum output power of 650W. With a 1U RPS form factor, this unit is reliable and efficient for providing power to server systems in a professional setting.*Tested and working, good condition.