Thermaltake PurePower W0099RU 250-Watt Dual VGA Card-Dedicated Power Supply Unit Two 6-pin PCI-Express connectors support nVIDIA SLI technology Fits into any 5.25" drive bay of all cases Keeps stable power input for graphic cards to maximize the overclock-ability and performance Three LEDs display: red for power on, one green LED for 12V1, and another one for 12V2 Input Circuit, Over Power, Short-Circuit, Under Voltage, Over Voltage, and Over-temperature protection