TC-2U40 400W ATX Single Power Supply for 2U Rackmount AC input: 90 to 132 or 180 to 264 auto selectable 47Hz ~ 63Hz 24 + 8 + 4pin for Dual Xeon/Dual Opteron Output Wattage: 400w Over-voltage protection/Over-power protection/Short-circuit protection Built-in EMI filter