The Supermicro PWS-333-1H is an 80 Plus Gold level power supply capable of supplying 330W low-line 380W high-line output power at 91% efficiency. Enjoy the simplicity of active power factor correction (PFC) and automatically correct AC input for a full range of voltages and a quiet fan to keep it cool under heavy loads. This power supply is designed to not only provide you reliable power to your desktop or workstation but also protects it from over voltage, over current and short circuiting via protective circuitry embedded into the unit. All materials contained comply with RoHS requirements and is certified by Supermicro.