# SFX POWER 3

- Category: Power Supply
- Brand: be quiet!
- Model: BN321
- Part number: BN321
- Price (US): $219.45
- Price last checked: 2026-08-05
- Rating: 4.5/5 from 19 Amazon reviews
- Warranty: 1 year
- Product page: https://buildmypc.net/component-details/power-supply/be-quiet-bn321/

## Specifications

| Spec | Value |
| --- | --- |
| Brand | be quiet! |
| Model | BN321 |
| Power | 450 W |
| Efficiency | 80+ Bronze |
| Color | Black |
| Form Factor | SFX |

## Key Features

- BN321
- Strong 12 V cable with 450 W power
- Two PCIe ports for powerful GPUs
- Coated cable or ribbon cable with up to 60 cm length
- Temperature-controlled 80 mm Qualit fan for quiet system operation of max. 33.8 dB(A)

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