Be quiet! CPU cool Dark Rock 4, Intel / AMD [BK021]

- 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 conductanceWave-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 finish
- 3-year manufacturer’s warranty
- Product conception, design and quality control in Germany

Technical Details
- Dimensions (L x W x H), (mm): 74.3 x 136 x 159.4
- Number of fins :51
- Fin material :Aluminum
- Base material :Copper
- CPU contact surface :CNC machined
- Heatpipe number / Diameter (mm): 6, 6
- Surface treatment :Aluminum / black ceramic spray painted

Fan Specifications
- Fan dimensions (mm):135 x 135 x 22
- +SilentWings ✓
- Speed @ 100% PWM (rpm) :1,400
- 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