Outstanding flexibility and silence
be quiet! Dark Base 900 Black is the perfect case for all of those who expect the highest standards when it comes to modularity, compatibility and design.
- Relocatable MB-tray with the possibility of an inverse layout
- Repositionable HDD tray with single HDD slots for individual space requirements
- Three pre-installed, virtually inaudible be quiet! Silent Wings 3 140mm PWM fans
- Manual stepless fan controller supports up to three 3-pin fans
- Effective full-circuit airflow system with noise-reducing vents all around the case
- Water cooling ready for radiators up to 420mm on top, front, back and base
- Completely sound insulated with decoupled elements for motherboard, power supply and drive slots
- Three years manufacturer’s warranty
- German product conception, design and quality control
be quiet! Dark Base 900 Black offers unrivaled flexibility with impeccable cooling and silence features. Simply an engineering work of art!
| Model | Dark Base 900 Black |
| PSU form factor | ATX PS/2 |
| Motherboard compatibility | E-ATX / XL-ATX / ATX / M-ATX / Mini-ITX |
| Case size excl. stands (L x W x H), (mm) | – |
| Installation of motherboards with backplate | ✓ |
| Case size incl. stands (L x W x H), (mm) | 577 x 243 x 585 |
| Dimensions side panel window (L x W), (mm) | – |
| Color option | Black |
| Weight (kg) | 14.18 |
| USB 2.0 | 2 |
| USB 3.2 Gen. 1 | 2 |
| USB 3.2 Gen. 2 Type C | – |
| HD Audio I/O | Mic + Audio |
| Expansion slots | 8 |
| Fan mounting locations | 12 |
| Qi charger / Quick Charging Option | – |
| Top cover | ABS / Aluminum |
| Side panel | ABS / Steel |
| Side panel window | – |
| Front panel | ABS / Aluminum |
| Stands | ABS |
| 5.25 bays | 2 |
| 3.5 slots (max.) | 7 |
| 3.5 slots (scope of delivery) | 7 |
| 2.5 slots (max.) | 15 |
| 2.5 slots (scope of delivery) | 15 |
| Fan @ top | – |
| Fan @ front | 2x Silent Wings 3 140mm PWM |
| Fan @ rear | 1x Silent Wings 3 140mm PWM |
| Dimensions (L x W x H), (mm) | Front: 140 x 140 x 25 / Rear: 140 x 140 x 25 |
| Fan speed @ 100% PWM / 12V (rpm) | 1000 |
| Noise level @ 100% PWM / 12V (dB(A)) | 15.5 |
| Airflow @ 100% PWM / 12V (cfm / m3/h) | 59.5 / 101.09 |
| Air pressure @ 100% PWM / 12V (mm H2O) | 1.08 |
| Voltage range (V DC) | 5 – 13.2 |
| Input power (W) | 3.6 |
| Input current (A) | 0.3 |
| Connector | 4-pin |
| Lifespan (h / 25°C) | 300,000 |
| Fan controller | Manual stepless fan controller (3x 4-pin / 3x 3-pin) |
| Front (mm) | 1x 140 (w/o ODD cage) |
| Top (mm) | 4x 120 / 3x 140 / 1x 180 |
| Bottom (mm) | 2x 120 / 2x 140 |
| Side panel (mm) | 2x 120 |
| PSU shroud | – |
| Front (mm) | 120 / 140 / 240 / 280 / 360 / 420 |
| Top (mm) | 120 / 140 / 180 / 240 / 280 / 360 / 420 |
| Bottom (mm) | 120 / 140 / 280 |
| Rear (mm) | 120 / 140 |
| Max.construction height of CPU cooler unit (mm) | 185 |
| Airflow channel | Full circuit airflow system |
| RGB LED illumination | – |
| LEDs synchronizable with RGB controller/motherboard | – |
| Expandable RGB controller | – |
| Maximum dimensions excl. bottom fan (mm) | 284 |
| Maximum dimensions incl. bottom fan (mm) | 150 |
| HDD cage (in height of graphics card) installed (mm) | 323 |
| HDD cage (in height of graphics card) removed (mm) | 472 |
| Top panel insulation mats | – |
| Front panel insulation mats | ✓ |
| Side panel insulation mats | ✓ |
| Anti-vibration decoupled HDD | ✓ |
| Anti-vibration decoupled fan | ✓ |
| Anti-vibration decoupled PSU | ✓ |
| Anti-vibration decoupled motherboard-tray | ✓ |
| Screw set (Drives/Motherboard) | ✓ |
| Rubber rail (pcs.) | – |
| Standoff (pcs.) | 3 (for E-ATX) |
| LCS bracket (pcs). | 1 |
| HDD slot cover (pcs.) | – |
| Upper fan bracket (pcs.) | 1 |
| HDD panel rubber grommet (pcs.) | 1 |
| SSD bracket for PSU shroud | – |
| LED strips (pcs.) | – |
| Cable ties (pcs.) | 6 (Velcro) |
| Warranty (Years) | 3 |
| International hotline / free of charge | ✓ / DE, FR |
| Article number | BG011 |
| EAN code | 4260052184929 |
| Certifications | CE / RoHS |
| Dimensions, package (L x W x H), (mm) | 655 x 325 x 680 |
| Gross weight, package (kg) | 16.3 |
| Pieces per packaging unit | 1 |
| RRP (€) | 209.00 |
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