Cooler Master Ultimate Circuit Protection 900-Watt Power Supply Unit - (RS900-AAAAA3-US) VRM (Voltage Regulation Module) Circuit offers high efficiency and Power density Compliance with the newest Intel standard ATX 12V V2.3 and the newest SSI standard EPS 12V V2.92 Ultra-silent operation with intelligent 120mm fan speed control Eco-design for energy and money saving by Active PFC (###GT!!!0.9) / high efficiency (###GT!!!88%) Power Failure Detector will light up when OVP/OCP/OPP/SCP/UVP/OTP occur