The Tomahawk ETK500AWT ATX12V Power Supply with high-Quality components and dual 12V rails design to enable non-stop usage with stable current. Ultra silent 12cm fan with intelligent RPM control guarantees cool performance and silent operation. Patented air-inlet with optimal aero-dynamical design reducing noisy air turbulence"s. Triple protection circuitry of OVP, OPP & SCP protect Power Supply and system from damage.