A good Power Supply Unit (or “PSU”) provides enough power to run a compatible device but won’t overload its sensitive electronics. The HP 511777??001 Common Slot Power Supply is specially designed to complement your ProLiant G6/G7 Server configuration, delivering 460?W of reliable AC power. In addition, this is a High-Efficiency, Gold, Hot-Plug PSU. This HP 511777??001 Power Supply has been removed from a working unit, tested for complete functionality by our expert in-house HP-Certified Technician, and is ready to ship today! Purchase with confidence, as the photos above represent the exact quality of your items, and come bundled with our 90 Day Warranty. *Please note, we have additional refurbished HP Server PSUs in stock; feel free to send a message and we will update the quantity to suit your specific needs.* Thank you for choosing AltaTech for all of your lightning-fast IT needs!