Article number: BGW50



Outstanding versatility, performance and silence

Dark Base Pro 901 is the epitome of a flexible, yet user-friendly case.

  • Interchangeable top cover and front panel for either maximum airflow or virtually inaudible operation
  • Fan and radiator brackets with integrated fan hub in front and top make installation a breeze
  • 3 Silent Wings 4 PWM fans for a virtually inaudible operation and high performance
  • Touch-sensitive I/O panel for state-of-the-art operation
  • Generous dimensions ensure operation of E-ATX motherboards and radiators up to 420mm
  • Well-conceived system for an extremely user-friendly handling
  • Flexible motherboard tray for an inverted layout
  • Subtle ARGB lighting in the front and the PSU Shroud


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The best case in any situation

Whether you prefer a virtually inaudible or an extremely performant case: Dark Base Pro 901 is the perfect choice. Dark Base Pro 901 features a silence-oriented and performance-optimized solution for the top and the front. All panels are included, and a user-friendly mounting makes
switching a breeze.


For professional and casual use

Dark Base Pro 901 offers all functions enthusiasts could wish for in a high-end case. Among them is a detachable top and front bracket with included fan hub and pogo pin connector for a comfortable installation of radiators and fans. Even an inverted layout can be done easily thanks to an intuitive rail system. Numerous cleverly integrated solutions make handling extremely easy. Dark Base Pro 901 can be deployed without the hassle of additional screws and small parts, creating the optimal case for any build.


3 pre-installed fans for maximum airflow

Features like the silence-optimized fan blades and the funnel shaped fan frame make Silent Wings 4 140mm a fan that makes no compromises between virtually inaudible operation and high performance. Its extraordinary air pressure significantly increases the cooling performance of
Dark Base Pro 901.


Generous dimensions for radiators up to 420mm

With its remarkably large dimensions, Dark Base Pro 901 sets no limits on creativity. The front can fit a radiator of up to 420mm and additional fans can be installed throughout the case, even on the side panel.


For a neat interior

The VGA holder of Dark Base Pro 901 is very versatile and prevents GPU sag even with heavy graphics cards. 2 cable bars, one located inside the VGA holder and the other next to the motherboard tray, hide the cables inside the case. No matter how big or numerous the components built in Dark Base Pro 901 may be; with such clever features the result always makes a
good impression.


And convenient features

Dark Base Pro 901 features ARGB lighting on the front and the PSU shroud: The lit-up areas are chosen consciously to ensure the case remains elegant with subtle illumination. The light and fan settings can be conveniently controlled via touch-sensitive buttons on the I/O panel.  A wireless charger for Qi enabled devices perfectly rounds up Dark Base Pro 901.


A perfect view inside your PC

The high-quality, fully-windowed side panel offers a perfect view of the components inside your case. The window is made of tinted and tempered glass with black painted edges.

"Dark Base Pro 901 is the climax: The case's maximum versatility and performance is rounded up by new characteristics that have never been featured in a be quiet! case before."

Aaron Licht, Chief Executive Officer

All models at a glance:

Product Series

General data

ModelDark Base Pro 901
Color optionBlack
Motherboard compatibilityE-ATX / XL-ATX / ATX / M-ATX / Mini-ATX
Case size excl. stands (L x W x H), (mm)604 x 254 x 539
Case size incl. stands (L x W x H), (mm)604 x 275 x 569
Volume (l)82.69
PSU form factorATX PS/2
Net weight (kg)17.8
Expansion slots8


open all / close all

Pre-installed fans

Fan at top-
Fan at front2x Silent Wings 4 140mm PWM
Fan at side-
Fan at rear1x Silent Wings 4 140mm PWM
Fan at bottom-
Dimensions (L x W x H), (mm)Front: 140 x 140 x 25 / Rear: 140 x 140 x 25
Fan speed at 100% PWM / 12V (rpm)1900
Airflow at 100% PWM / 12V (CFM / m3/h)78.4 / 133.2
Air Pressure at 100% PWM / 12V (mm H2O)2.36
Noise level at 100% PWM / 12V (dB(A))29.3
Voltage range (V DC)12
Input power (W)4.8
Input current (A)0.4
Connector4-pin PWM
Lifespan (h / 25°C)300,000
Fan controller5-step fan controller with 2x PWM Hubs

Maximum fan installation

Maximum fans11
Top (mm)3x 140 / 3x 120
Front (mm)3x 140 / 3x 120
Side (mm)3x 120
Rear (mm)1x 140 / 1x 120
Bottom (mm)1x 140 / 1x 120
PSU shroud-

Optional radiator installation

Top (mm)120 / 240 / 360
Front (mm)120 / 140 / 240 / 280 / 360 / 420
Side (mm)120 / 240 / 360
Rear (mm)120 / 140
Bottom (mm)-

PSU compatibility

Maximum dimensions excl. bottom fan (mm)325
Maximum dimensions incl. bottom fan (mm)325

Graphics card

HDD cage (in height of graphics card) installed (mm)350 / 370
HDD cage (in height of graphics card) removed (mm)495
Maximum PCIe slots with vertical graphics card (pcs.)8

Drive bay capacity

5.25 bays (pcs.)1
3.5 slots (scope of delivery)2
3.5 slots (max.)7
2.5 slots (scope of delivery)6
2.5 slots (max.)16

Cooling height of CPU cooler unit (mm)190
Airflow channel-


LED illumination
LEDs (pcs.)8 + 16
LED typeARGB - 5V
LEDs synchronizable with controller/motherboard

I/O Panel

USB 3.2 Gen. 2 Type C1
USB 3.2 Type A4
USB 2.0-
HD Audio I/OMic + Audio
Qi charger / Quick Charging Option (W)15

Insulation and damping

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

Scope of delivery

Screw set (Drives/Motherboard)
Additional standoffs (pcs.)3 (for E-ATX)
SSD bracket for PSU shroud-
LED strips (pcs.)0
Cable ties (pcs.)12
Screw box
VGA holder
VGA holder for inverted layout
Mesh Front Panel
ODD Bracket
Fan / Radiator bracket for multi mounting panel

Removeable dust filters



Top coverAluminum
Front panelAluminum
Side panelSteel
Side panel windowTempered glass

Safety certification

ApprovalsCE, UKCA

Environmental directives



Warranty (Years)3
International hotline / free of charge✓ / DE, FR, US

Logistics data and RRP

Article numberBGW50
EAN code4260052190142
Dimensions, package (L x W x H), (mm)633 x 357 x 684
Gross weight, package (kg)20.9
Pieces per packaging unit1
RRP (€)319.90

DARK BASE PRO 901 | Black
Article number: BGW50