be quiet! Dark Base Pro 900 Black rev. 2 is the perfect case for all who expect the highest standards when it comes to modularity, compatibility and design.


  • Motherboard tray and HDD slots with enhanced possibilities for individual requirements
  • Three Silent Wings 3 PWM fans 
  • Stepless dual-rail fan controller is switchable between Silence and Performance modes
  • Ready for radiators up to 420mm
  • PSU shroud and HDD slot covers provide a neat interior
  • Side panel made of tempered glass
  • Eye-catching RGB LED illumination 
  • Three years manufacturer’s warranty 
  • German product conception, design and quality control



Primary differences with the rev2

  • PSU shroud and HDD slot covers provide a neat interior
  • The fan hub now supports eight PWM fans
  • Fan/LED controller also include “performance-silent” toggles
  • Included fans are now 1600RPM rather than 1000RPM
  • USB 3.1 Gen 2 Type C and a quick charging port
  • The two bundled RGB LED strips are 12V for wider compatibility
  • Top and bottom tips of the side window have also been painted black


Flexibility for individual requirements

The decoupled motherboard tray adapts to suit individual requirements, being completely relocatable and usable as a test bench. You can adjust it to three different heights or install it alongside the left panel in an inverted layout with redefined airflow. It is fully compatible with E-ATX and XL-ATX motherboards.



Silent Wings 3

Impeccable cooling and silence

The three preinstalled Silent Wings 3 140mm PWM fans offer virtually inaudible operation. They are equipped with a smooth-running 6-pole motor, durable fluid-dynamic bearing and airflow-optimized fan blade design. The frame has funnel-shaped air inlets that generate high air pressure.



Modular HDD Slots

Generous space for your setups

The installation options are flexible thanks to repositionable single HDD slots. Supports up to 5 HDDs, 10 SSDs and 2 optical drives out of the box. The practical slot covers serve to hide any unused HDD slots and keep the inner workings neat and tidy. This enables you to create systems that are just as individual as you are yourself.



Very Functional PSU Shroud

Offering unexpected possibilities

The PSU shroud offers you a variety of solutions – not just for hiding the PSU and to keep the system neat and tidy. The cover plates are separately detachable, making it possible to install a fan or an SSD on the top of the PSU shroud and leave enough space for a radiator in the front.



Full Circuit Airflow System

A silence concept by the silence experts

With its smart silence concept, Dark Base Pro 900 rev. 2 is the perfect case for the extreme requirements of overclocked systems and super silent water-cooled PCs. It can carry up to seven additional fans, up to four radiators and has noise-reducing vents all around the case that provide ultra-effective full circuit airflow.



Dual Rail Fan Controller

Creating separate cooling zones

The eight PWM fan connectors are divided over two rails, and each is switchable between Silence and Performance Mode. This makes it possible to create two cooling zones that can be controlled by just the front panel switch. If you want all fans to run at the same speed, you can switch both channels to the same mode.



Tempered Glass and LEDs

A perfect view inside your PC

The case is equipped with an elegant, fully windowed side panel that is made of tinted and tempered glass. The eye-catching internal LED illumination comes in six switchable colors. You can locate the LED strips freely inside the PC case.



Smart I/O Port and Convenient Charger

Fulfilling practically every desire

The front I/O port offers perfect compatibility for your high-end PC. A connector of USB 3.1 Type C Gen. 2 is supported. Integrated wireless charger for Qi enabled devices such as smart phones.

Be Quiet! Dark Base Pro 900 Rev2 Gaming Case, E-ATX, No PSU


Product Description

Be Quiet! Dark Base Pro 900 Rev2 Gaming Case, E-ATX, No PSU, PSU Shroud, 3 x SilentWings 3 Fans, LEDs, Wireless Charger, Black

Form Factor


Power Supply Wattage


Motherboard Support


Connectors / Controls

2 x USB 3.0
1 x USB 3.1 Gen 2 Type C
HD Audio I/O

Drive Bays

2 x 5.25 bays
7 x 3.5 slots (max.)
5 x 3.5 slots (scope of delivery)
14 x 2.5 slots (max.)
10 x 2.5 slots (scope of delivery)

Expansion Slots

8 x Expansion Slots

Cooling System

2 x front 140mm Silent Wings PWM fans
1 x rear 140mm Silent Wings PWM fan

1 x front 140mm (w/o ODD cage)
3 x top 140 / 4x 120 / 1x 180mm
2 x bottom 120/140mm


Water Cooling options:
Front (mm): 120 / 140 / 240 / 280 / 360 / 420
Top (mm): 120 / 140 / 180 / 240 / 280 / 360 / 420
Rear (mm): 120 / 140




Top cover: ABS, Aluminum
Side panel: Steel, ABS
Side panel window: 4mm tempered glass
Front panel: ABS, Aluminum
Stands: ABS


Max GX Card height: 472mm (HDD cage removed)

Max CPU Cooler height: 185mm

PSU: 284mm (excl. bottom fan)


14.39 kg
140 x 140 x 25 mm

Additional Features

See Overview


Screw set (Drives/Motherboard)
3 x Standoff (pcs.)(for E-ATX)
1 x LCS bracket (pcs)
6 x HDD slot cover (pcs.)
1 x Upper fan bracket (pcs.)
1 x SSD bracket for PSU shroud
1 x LED strips (pcs.)
6 x Cable ties (pcs.) (Velcro)

Package Weight

18.1500 kg


2 Years