StarTech.com 400 Watt Silent ATX 12V 2.01 PC Computer Power Supply with 120mm Fan ATX 2POW400HS Automatic temperature-controlled fan keeps the power supply quiet during low power demand Compatible with many single/multi-core Intel or AMD ATX12V 2.01 compatible systems and full sized ATX cases. High performance components and connectors are designed for extra long life and provide maximum system performance Improves system reliability by providing stable power to all components ATX12V 2.01 compliant and 24/20 pin split ATX connector for compatibility with existing standards Premium EMI/RFI power filtration provides low noise and ripple for stable power delivery Quad+1 protection against: short circuit, over power, over voltage, no load Two 12V power rails to deliver stable power to demanding devices