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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.


Weight 1.43 kg


EAN Number


Manufacturer Number



Be Quiet! TFX Power 3


300 W


Fully Wired


TFX12V v2.52 & EPS 12V v2.92


1 x ATX-Motherboard (20+4-pin) 1 x P4 (CPU) 2 x PCI-e 6+2-pin (GPU) 3 x SATA 2 x PATA 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

Rifle Bearing


dB(A) at 20% load: 9.7 dB(A) at 50% load: 12.4 dB(A) at 100% load: 21.7

80+ Certification

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

Package Contents

PSU Screws Cable ties User manual


1.1 kg Without cable (LxWxD): 175 x 85 x 65 mm


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