Enermax Revolution SFX 550W 80 Plus Gold Full Modular Semi-Fanless (ERV550SWT)

REVOLUTION SFX series with 650W and 550W models, featuring the highest power output in 100mm depth chassis, which gives users greater flexibility in system configuration. Full modular design with 100% flexible flat cables facilitates cable management, avoiding annoying clutter especially in a small case like Mini-ITX. Furthermore, through the included SFX-to-ATX bracket, it's workable to install the PSU in Micro-ATX or ATX cases as well. Undoubtedly, users can make ultra compact but powerful PC builds with more flexibility with REVOLUTION SFX. Noise is an obvious issue in using a SFX form factor PSU due to its much smaller dimensions than an ATX model and the required higher fan speed that follows. To solve the problem, REVOLUTION SFX is equipped smart semi-fanless control. Before reaching 30% of system load, REVOLUTION SFX is in fanless mode and its fan does not spin at all, meaning absolute silence under idle or ordinary working conditions. On the other hand, when system load exceeds 30%, the fan starts to spin and sufficient cooling is ensured by the thermal control system/programmer.