Be Quiet! TFX Power 3 300W Bronze PSU for Compact Systems

The Be Quiet! TFX Power 3 300W Bronze delivers reliable power for mini and media PCs requiring a small form factor solution. This TFX power supply combines 80 PLUS Bronze efficiency with PCIe graphics card support, making it suitable for compact builds that need dependable performance without compromising on quality.

80 PLUS Bronze Certified Efficiency

Certified to 80 PLUS Bronze standards, this PSU achieves up to 88.3% efficiency at 50% load, reducing energy waste and heat generation. The efficiency ratings include 84% at 20% load, 88.3% at 50% load, and 86.4% at 100% load under 230V operation. Active PFC ensures stable power delivery while maintaining low standby draw of less than 0.14 watts.

Strong Single 12V Rail Design

The single 12V rail architecture provides maximum stability for CPU power delivery while supporting demanding peripherals. One PCI Express 6+2-pin connector enables dedicated graphics card support, making this 300W PSU capable of handling small form factor gaming or workstation builds. The rail design ensures consistent power distribution across all components.

Quiet Operation with Temperature-Controlled Fan

The high-quality 80mm rifle bearing fan operates with temperature-based control, maintaining low noise levels across different load scenarios. Noise output measures 14.6 dB(A) at 20% load, 15.4 dB(A) at 50% load, and reaches only 29.1 dB(A) at full 100% load. This temperature-controlled approach balances cooling performance with acoustic comfort.

Comprehensive Connectivity

Connection options include one 20+4-pin ATX motherboard connector, one P4 CPU connector, one PCI-e 6+2-pin GPU connector, three SATA connectors, two PATA connectors, and one FDD connector. Cables are available in sleeved or flat black designs extending up to 60cm, providing flexibility for cable management in compact cases.

Complete Protection Suite

Built-in protection mechanisms guard against overcurrent, overvoltage, undervoltage, short circuit, over temperature, and overpower conditions. These safety features meet the latest TFX12V v2.52 and EPS 12V v2.92 standards, protecting your system components from electrical failures. The PSU is rated for 100,000 hours MTBF.

German Engineering and Quality

Product conception, design, and quality control are performed in Germany, ensuring manufacturing standards meet Be Quiet! specifications. The unit measures 175 x 85 x 65 mm and weighs 0.9 kg. Each purchase includes the PSU, mounting screws, cable ties, and user manual, backed by a three-year manufacturer's warranty.

Description

Specification

• Form Factor: TFX
• Series: Be Quiet! TFX Power 3
• Wattage: 300 W
• Modular: Fully Wired
• Compatibility: TFX12V v2.52 & EPS 12V v2.92
• #Hide#Wattage Range: 300 - 400W
• Connectors: 1 x ATX-Motherboard (20+4-pin
  1 x P4 (CPU)
  1 x PCI-e 6+2-pin (GPU)
  3 x SATA
  2 x PATA
  1 x FDD (Floppy)
• Rail Design: Single 12V rail
• AC Input: AC 100-240 V
• PFC: Active PFC
• Fan Type: High-quality temperature-controlled 80mm fan
• Fan Bearing: Rifle Bearing
• Noise: dB(A) at 20% load: 114.6
  dB(A) at 50% load: 15.4
  dB(A) at 100% load: 29.1
• Max Certification: Bronze
• Efficiency: "80+ Bronze
  230V, 20% load: 84%
  230V, 50% load: 88.3%
  230V, 100% load: 86.4%"
• MTBF: "100,000 hours"
• Protection: Over current
  Over voltage
  Under voltage
  Short circuit
  Over Temperature
  Over Power
• Additional Features: See Overview
• Package Contents: PSU
  Screws
  Cable ties
  User manual
• Weight/Dimensions: 0.9 kg
  Without cable (LxWxD): 175 x 85 x 65 mm
• Package Weight: 1.2400 kg
• Warranty: 3 Years