Zumax 500W ATX12V/EPS12V 20/24 Pin Power Supply ZU-500W Black Powder Case Silent Black Cooling Fan User Control Turbo Fan Switch Support both Intel and AMD Systems Built-in inrush current, over temperature, over current, and over voltage protection circuits Switching power supply ATX12V Ver. 2.0 ATX12V Version 2.0 Dual cooling fan push and pull airflow design Support 6pin PCI-Express Connector Turbo Fan Switch (fan runns at full speed when pressed)