Be Quiet! 300W TFX Power 3 PSU, Small Form Factor, 80+ Gold, 2 PCIe, Continuous Power

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TFX Power 3 300W Gold_ the upgraded be quiet! high-efficiency PSU for mini and media PCs with 80 PLUS® Gold certification and PCIe graphics card support.

  • Certified 80 PLUS® Gold efficiency (up to 91.7%)
  • Strong dual 12V-rails for high stability and PCIe graphics card support
  • Two 6+2pin PCIe connectors for powerful GPUs
  • 300W of continuous power
  • High-quality temperature-controlled 80mm fan for low-noise operation of max. 21.7dB(A)
  • Sleeved or flat black cables up to 60cm long
  • Meets the latest safety and efficiency requirements
  • Standby draw less than 0.17 watts
  • Three-year manufacturer’s warranty
  • Product conception, design and quality control in Germany

80 PLUS® Gold Certification

Very high operating efficiency

TFX Power 3 300W Gold is certified 80 PLUS Gold with an efficiency rating of up to 91.7%. With this outstanding energy efficiency, the TFX Power 3 300W Gold ensures low power consumption and by that lower costs alike.

Strong Dual 12V Rail

For a stable operation

The dual 12V rail design supports high stability as the CPU receives its power through an independent rail. For demanding peripherals like a graphics card, a PCIe connector is included.  This makes the TFX Power 3 300W Gold the ideal PSU for all who strive for enough power to support small systems at low noise

Quiet And Safe

Optimized for low-noise operation

The temperature-controlled fan ensures a quiet operation and produces little wasted heat. Since TFX Power 3 300W Gold meets the latest safety requirements, it defends the PC system against overcurrents, over- and undervoltage, short circuit, overloads and comparable failures.


Package Contents
80+ Gold
230V, 20% load_ 88.9% 230V, 50% load_ 91.7% 230V, 100% load_ 90.6%
100,000 hours
Over current Over voltage Under voltage Short circuit Over Temperature Over Power
Additional Features
See Overview
PSU Screws Cable ties User manual
dB(A) at 20% load_ 9.7 dB(A) at 50% load_ 12.4 dB(A) at 100% load_ 21.7
1.1 kg Without cable (LxWxD): 175 x 85 x 65 mm
Package Weight
1.4300 kg
3 Years

80+ Certification
Form Factor
300 W
Be Quiet! TFX Power 3
Fully Wired
TFX12V v2.52 & EPS 12V v2.92
#Hide#Wattage Range
300 - 400W
Rifle Bearing
1 x ATX-Motherboard (20+4-pin) 1 x P4 (CPU) 2 x PCI-e 6+2-pin (GPU) 2 x PATA 3 x SATA 1 x FDD (Floppy)
Rail Design
Dual12V rails
AC Input
AC 100-240 V
Active PFC
Fan Type
High-quality temperature-controlled 80mm fan
Fan Bearing

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