Product information: ZM360B-APS 360W ATX2.03 PSUWith the goal of enhancing the computing environment, all Zalman Tech products are ultra-quiet. This product is an ultra quiet 460W ATX Ver. 2.03 / ATX12V Ver. 2.01 power supply supporting SLI-capable Intel LGA775 Pentium 4/D & AMD Athlon 64/64 FX/X2 CPU equipped systems. By implementing heat-sensor circuitry that controls the cooling fan's speed (rpm) in relation to the temperature within the power supply, noise has been greatly reduced. The graph below shows the CNPS characteristics of our product.