be quiet! SFX Power 3 450W BN321 - 80 PLUS Bronze Non-Modular Compact PSU
Compact 450W SFX PSU with 80 PLUS Bronze efficiency, non-modular design, and ultra-quiet 80mm fan (33.8dB max). Ideal for mini-ITX and media center builds.
For any questions about this item, availability, or delivery times, please contact us at 22 270068
The be quiet! SFX Power 3 450W (BN321) is a compact power supply engineered for mini-ITX and small form factor PC systems. Delivering 450W of continuous power with a 500W peak capacity, this PSU provides reliable performance for systems with powerful PCIe graphics cards while maintaining exceptional quietness. The high-quality 80mm temperature-controlled fan operates at a maximum of 33.8dB(A), ensuring silent operation even under full load.
With 80 PLUS Bronze certification and up to 89.3% efficiency, the SFX Power 3 minimizes power waste and reduces electricity costs. The non-modular cable design simplifies installation in compact cases, while the SFX12V 3.42 form factor (125mm × 100mm × 64mm) fits seamlessly into space-constrained builds. Featuring comprehensive protection against overcurrent, overvoltage, short circuits, and other electrical faults, this PSU is built for reliability and longevity with a 100,000-hour MTBF rating.
Key features include:
- 450W continuous / 500W peak power output
- 80 PLUS Bronze efficiency certification
- Ultra-quiet 80mm rifle-bearing fan (max 33.8dB)
- Non-modular fixed cables for compact installations
- 2x PCIe 6+2 pin connectors for graphics cards
- 1x 4+4 pin EPS connector for CPU power
- 3x SATA and 2x Molex connectors
- Active PFC and comprehensive protection features
- RoHS and WEEE compliant
| Continuous Power Output | 450 W |
| Peak Power Output | 500 W |
| Form Factor | SFX12V 3.42 |
| EPS Version | 2.92 |
| Efficiency Rating | 80 PLUS Bronze (85.9% typical, up to 89.3%) |
| AC Input Voltage | 100 - 240 V |
| AC Input Frequency | 50 - 60 Hz |
| Input Current | 6 A @ 110V / 2.5 A @ 220V |
| Power Factor | >0.98 at 100% load |
| Power Factor Correction Type | Active |
| +3.3V Rail Output | 85 W max, 16 A max |
| +5V Rail Output | 85 W max, 16 A max |
| +12V Rail Output | 450 W max, 37.5 A max |
| -12V Rail Output | 0.3 A max |
| +5V Standby Output | 2.5 A max |
| Hold-up Time | 21 ms |
| Standby Power Consumption | <0.11 W |
| Protection Features | Overcurrent, Overvoltage, Undervoltage, Short Circuit, Overpower |
| Motherboard Connector | 20+4 pin ATX |
| Motherboard Cable Length | 35 cm |
| EPS CPU Connector | 1x 4+4 pin |
| PCIe GPU Connectors | 2x 6+2 pin |
| PCIe Cable Length | 55 cm |
| SATA Connectors | 3x |
| SATA Cable Lengths | 300 mm, 450 mm, 600 mm |
| Molex (4-pin) Connectors | 2x |
| Molex Cable Lengths | 300 mm, 450 mm |
| Floppy Connector | 1x |
| Floppy Cable Length | 60 cm |
| Cabling Type | Non-Modular |
| Fan Size | 80 mm |
| Fan Type | High-quality temperature-controlled |
| Bearing Technology | Rifle |
| Motor Technology | 4-pole fan motor |
| Maximum Fan Speed | 2366 RPM |
| Noise Level @ 10% Load | 13.2 dB(A) |
| Noise Level @ 20% Load | 13.2 dB(A) |
| Noise Level @ 50% Load | 13.2 dB(A) |
| Noise Level @ 100% Load | 33.8 dB(A) |
| Topology | DC/DC |
| Modern Standby Support | Yes |
| MTBF | 100,000 hours |
| Color | Black |
| Cooling Type | Active |
| On/Off Switch | Yes |
| Unit Width | 125 mm |
| Unit Depth | 100 mm |
| Unit Height | 64 mm |
| Unit Weight | 890 g |
| Safety Certifications | CE, CB, TÜV, CU |
| Compliance Standards | RoHS, WEEE |
| Sustainability Certifications | ENERGY STAR, ErP |
| HS Code | 84733020 |