Brontix FN-3991 Prime 120mm PWM ARGB Case Fan (3-Pack)
Case Fans · Brontix · SKU FN3991-PRIME · Released 2022 · Updated 2026-10-22
Key facts
| Benchmark index | 1,203 (Case Fans scale) |
|---|---|
| Category rank | #42,416 |
| Street price | $49 |
| Power | 3 W |
| Performance per dollar | 24.55 |
| Released | 2022 |
Specifications
| Brand | Brontix |
|---|---|
| Model | Brontix FN-3991 Prime |
| Size | 120 × 120 × 25 mm |
| Speed | 200–1,600 RPM (PWM) |
| Airflow | 54.4 CFM |
| Static pressure | 1.76 mmH₂O |
| Noise | 33 dBA |
| Bearing | Rifle bearing |
| Connector | 4-pin PWM + 3-pin 5V ARGB |
| Rated lifetime | 100,000 hours |
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Cite this page: Hardware Spec Index, “Brontix FN-3991 Prime 120mm PWM ARGB Case Fan (3-Pack)”, https://vextor7.com/item/20131960 (accessed 2026-10-22).