Rosewill Stallion Series 500-Watt Power Supply ATX12V RD500-2SB A maximum power of 500W delivers safe, reliable output for average gaming computer systems Two industry-leading independent +12v rails are provided for more stable and safer power output A large 120mm blue LED fan with Smart Temperature Sensor delivers whisper-quiet cooling through fan speed adjustments in response to load conditions The Rosewill RD500-2-SB power supply's cables are wrapped in mesh sleeving so your chassis stays neat for optimized air flow and enhanced cooling