Be Quiet! 450W SFX Power 3 PSU, Small Form Factor, Rifle Bearing Fan, 80+ Bronze, Continuous Power

£66.70 (£55.58 + VAT)

6 in stock

SKU: BN321 Category:

Product Information

Compact and Silent Energy

SFX Power 3 450W, the first choice compact PSU for mini and media PCs with 80 PLUS® Bronze and PCIe graphics card support. SFX Power 3 450W offers the ideal combination of power, quietness and reliability.
  • Strong 12V rail with 450W 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.

450 Watts Continuous Power Output

Ensures a steady and reliable operation

SFX Power 3 can deliver 450W 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.






Form Factor



0.89 kg
125 x 64 x 100 mm

Memory Model

Be Quiet! SFX Power 3


3 Years


See Overview


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


100,000 hours


Fully Wired


Be Quiet! SFX Power 3


450 W

AC Input

AC 100-240 V


Active PFC

Fan Type

Fan Bearing

Rifle Bearing

80+ Certification

80+ Bronze


Over current
Over voltage
Under voltage
Short circuit
Over power