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be quiet! DARK ROCK 4 BK021
ر.ع.29.52
No Compromise Silence and Performance
Dark Rock 4 offers an extreme cooling performance and virtually inaudible operation. Perfect for overclocked systems and demanding workstations.
- Silent Wings 135mm PWM fan features an advanced fluid-dynamic bearing and a smooth 6-pole motor
- Optimal balance of cooling and quietness with only 21.4dB(A) at maximum fan speed
- Six high-performance copper heat pipes that provide maximal heat conductance
- Wave-contoured cooling fins for increased air circulation
- Special black coating with ceramic particles enables perfect heat transfer
- Supports an additional 120mm fan; clips are included in scope of delivery
- Easily installable black installation kit can be mounted from above
- Elegant, brushed aluminum top cover with diamond cut finish3-year manufacturer’s warranty
- Product conception, design and quality control in Germany
General data
| Model | Dark Rock 4 |
| Overall dimensions without mounting material (L x W x H), (mm) | 96 x 136 x 159 |
| Total weight (kg) | 0.92 |
| TDP (W) | 200 |
| Socket compatibility AMD | AM2(+) / AM3(+) / AM4 / FM1 / FM2(+) |
| Socket compatibility Intel | 1200 / 1150 / 1151 / 1155 / 1156 / 1366 / 2011(-3) Square ILM / 2066 |
| Fan model, number | 1x Silent Wings 135mm PWM |
| Decoupled fan mounting | ✓ |
| Overall noise level (dB(A)) @ 50/75/100% (rpm) | 10.5 / 15.6 / 21.4 |
Heatsink specifications
| Dimensions (L x W x H), (mm) | 74 x 136 x 160 |
| Number of fins | 51 |
| Fin material | Aluminum |
| Base material | Copper |
| CPU contact surface | CNC machined |
| Heatpipe number / Diameter (mm) | 6 / 6 |
| Color | Black |
| Surface treatment | Ceramic coating |
Fan specifications
| Fan dimensions (mm) | 135 x 135 x 22 |
| Speed @ 100% PWM /12V (rpm) | 1400 |
| Bearing technology | Fluid Dynamic Bearing |
| Motor technology | 6-pole fan motor |
| Rated voltage (V) | 12 |
| Input current (A) | 0.11 |
| Input power (W) | 1.32 |
| Connector | 4-pin PWM |
| Cable length (mm) | 220 |
| Lifespan (h / 25°C) | 300,000 |
Accessories
| Thermal grease | Included |
| Mounting set | Intel & AMD |
| Y-Cable | – |
| User manual languages | DE, EN, ES, FR, PL, RU |
Logistics data, RRP
| Article number | BK021 |
| EAN code | 4260052186251 |
| Dimensions, package (L x W x H), (mm) | 149 x 205 x 214 |
| Gross weight, package (kg) | 1.17 |
| Pieces per packaging unit | 12 |
| Dimensions, shipping box (L x W x H), (mm) | 427 x 465 x 463 |
| Gross weight, shipping box (kg) | 19.1 |
See More Details at bequiet.com
Additional information
| Weight | 1.86 kg |
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