Antec PHANTOM 500 EC 115VA Grey uninterruptible power supply (UPS)

Phantom500 EC- 500 Watt ATX12V v2.0 PSU New and More Powerful Phantom
Building upon the technology that made our revolutionary Phantom 350 power supply totally silent, the Phantom 500 with Antec's new Hybrid Fan technology, provides awesome power while continuing to offer the user an extremely quiet computing environment. Phantom 500 operates completely silently until its internal temperature reaches a user selected temperature, whereupon the fan turns on to balance high power performance with quiet computing.