... Rack Mount Server Chassis Sure Star's 1U power supplies provide clean, reliable power to your vital networking hardware. If you are eager to extend your server's life, our 80 PLUS certified Power Supply is your ideal solution. Equipped with Active PFC, triple circuit protection, a 26dB noise level, and power range auto select, our 1U 250W to 600W power supplies have been chosen to support Mini-ITX computers, firewall and mail servers, encoders and decoders, video processingediting systems, portable devices, embedded systems and network appliances for decades.