The Cooler Master Watt Bronze 650W is a modular 80 Plus Bronze certified PSU with a semi-fanless mode. Under 15% load, The masterwork Bronze fan remains idle, offering zero dBA. When demand for power increases, a gradual fan curve provides measured cooling with little to no noise at any output level. Dc-to-dc topology is employed to keep the voltage stable in all conditions. For increased performance, The masterwork Bronze 650 Watt is equipped with 16 AWG PCIe cables, which reduce resistance thereby increasing efficiency.