Specifications Mfr Model Number: TrueControl 550 550 Watt ATX12 power supply TrueControl control panel installs in 5.25" drive bay and still supports a 3.5" drive. Adjust voltage outputs and minimum fan speed from the front of your case. User-adjustable, individual dedicated circuits for main +3.3V, +5V, and +12V outputs. Dedicated output circuitry for each voltage output, overcomes the limitations of combined output of traditional design. Voltage Feedback to maintain accurate voltage to all components: adds stability to your system Antec Low Noise Technology achieves the optimum balance between noise reduction and necessary cooling. ATX12V for AMD and Intel based systems including P4. Two double ball bearing fans. Gold plated connectors.