Features: Dual "ball-bearing" fans with speed control to ensure of shut-down due to high temperature Suitable for all PC/Server cases Meets international safety standards Load-sharing in normal condition when one of the 400Wx2 power supplies shutdown, the other one will continue to operate Applications: Suitable for ATX PC system or ATX Server/ Workstation Specifications: DIMENSION- 195 (D) X 150 (W) X 85 (H) mm 400Watt ATX To make ATX power supply working, you need to plug in power connector to motherboard and fully installed. ATX power supply requires signal from motherboard to start up. AMD APPROVED