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Compact and Silent Energy

SFX Power 3 300W, the first choice compact PSU for mini and media PCs with 80 PLUS® Bronze and PCIe graphics card support. SFX Power 3 300W offers the ideal combination of power, quietness and reliability.
  • Strong 12V rail with 300W of continuous power
  • 6+2 pin PCIe connector for GPU support
  • High-quality temperature-controlled 80mm fan for quiet operation of max. 29.4dB(A)
  • Sleeved or flat black cables up to 60cm
  • 80 PLUS® Bronze efficiency (up to 89.2%)
  • Meets the latest safety and efficiency requirements
  • Three-year manufacturer’s warranty
  • Product conception, design and quality control in Germany

Strong 12V Rail
For a stable PCIe graphics support
A PCIe connector provides power for a demanding graphics card. Safety protections defend against overcurrents, over- and undervoltages, short circuits and overloads, thus keeping your valuable components safe.
300 Watts Continuous Power Output
Ensures a steady and reliable operation
SFX Power 3 can deliver 300W of continuous power. This ensures a steady and reliable operation even when your PC meets an unexpectedly heavy load.


Quiet and Efficient Operation
For mini or media PCs
The high-quality temperature-controlled 80mm fan allows quiet operations of max. 29.4dB(A). The 80 PLUS Bronze certification with an efficiency rating of up to 89.2% is convincing evidence of this PSU’s power saving operation.


Weight 1.19 kg


EAN Number


Manufacturer Number



Be Quiet! SFX Power 3


300 W


Fully Wired


SFX12V V3.42 & EPS 12V 2.92


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

Rail Design
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: 14.4 dB(A) at 50% load: 14.4 dB(A) at 100% load: 29.4

80+ Certification

80+ Bronze


230V, 20% load: 84.4% 230V, 50% load: 89.2% 230V, 100% load: 88.1%


100,000 hours


Over current Over voltage Under voltage Short circuit Over power

Additional Features

See Overview

Package Contents

PSU Screws Cable ties Manual


0.84 kg (L x W x D) 100 x 125 x 64 mm


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