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Exc. VAT : £ 177.50
Inc. VAT : £ 213.00

Be Quiet! Dark Base 900 Gaming Case, E-ATX, No PSU, Tool-less, 3 x Silent Wings 3 Fans, Modular Construction, Orange Trim

Exc. VAT : £ 177.50
Inc. VAT : £ 213.00
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Outstanding Flexibility and Silence
be quiet! Dark Base 900_ unrivaled flexibility with impeccable cooling and silence features. It was designed for high-end enthusiasts and individualists – all of those who expect the highest standards when it comes to modularity, compatibility and design for their high-end workstations as well as overclocked and silent water-cooled systems. 
Dark Base 900 has numerous modularity options to satisfy every desire with lots of features to support special configurations. Aluminum surfaces and steel offer highest stability with a look of extreme elegance. Simply an engineering work of art!
  • Fully versatile thanks to modular construction, offering an relocatable motherboard tray, repositionable HDD slots, support for even E-ATX and XL-ATX as well as the possibility of an inverse layout
  • Three pre-installed SilentWings® 3 140mm PWM fans featuring a smooth-running 6-pole motor, fluid-dynamic bearing and funnel-shaped air inlets
  • Effective full circuit airflow system with innovative noise-reducing vents all around the case
  • Completely sound insulated case with decoupled elements for motherboard, power supply and drives
  • Four areas for water cooling radiators up to 420mm on top, front, back and base of the case
  • 2-in-1 side panel vent can be closed for silent operation or opened for two additional fans
  • Product conception, design and quality control in Germany
• High-end workstations and desktop PCs
• High-resolution gaming and multimedia systems
• Extremely overclocked systems
• Super silent water-cooled PCs

Unrivaled Flexibility
• Motherboard tray with enhanced possibilities to suit individual space requirements
   - Completely relocatable and usable as a test bench
   - Adjustable to three different heights
   - Installation alongside the left panel for an inverted layout
• Repositionable HDD tray for individual space requirements inside the case
• E-ATX and XL-ATX support permits installation of practically any motherboard
• Installation options of up to 7 decoupled HDDs, 15 SSDs and 2 optical drives
Impeccable Cooling and Silence
• Three virtually inaudible SilentWings® 3 140mm PWM fans offer unrivaled and uncompromising performance with a broad range of amazing features_
   - 6-pole fan motor for very low power consumption and less vibration
   - Fluid-dynamic bearing with copper core enables a super long life span
   - Unique airflow-optimized fan blade design
   - Fan frame with funnel-shaped air inlets produces high air pressure
   - High quality IC motor controller reduces electrical noise
• Intelligent full circuit airflow system with noise-dampened vents all around the case
• Manual stepless fan controller supports up to three PWM and three 3-pin fans
• Installation of up to six additional 140mm fans or up to nine additional 120mm fans possible
• Ready for water cooling radiators up to 420mm with four mounting slots_
   - Front_ 420mm – Top_ 420mm – Back_ 140mm – Base_ 280mm
• Built-in insulation in front, top cover and side panels
• Decoupled motherboard tray, power supply tray and drive slots for reduced vibration and noise
• 2-in-1 side panel vent can be closed for silent operation or opened with the possibility to mount two additional 120mm fans

Advanced Assembly and Handling
• Generous space thanks to repositionable single HDD slots
• Impressive features permit individual configurations and setups
• Customizable cable management thanks to carefully placed pass-throughs
• Two cleanable dust filters that can be conveniently removed from the front
High-quality Materials and Elegant Design
• Premium aluminum surfaces
• Steel parts from 0.8mm to 1.0mm for highest stability
• Compatibility with all be quiet! products and all available graphics cards
Outstanding Service and Support
• 3-year manufacturer's warranty
• Quick support is available via our international hotline, Mondays to Fridays from 9_00am to 5_30pm CET_ 
+49 (0) 40-736 76 86 - 98


14.2 kg (L x W x H) 577 x 243 x 585 mm
Additional Features
See Overview
Package Weight
17.4500 kg
3 Years

VGA card_ 325mm w/o HDD slots_ 470 mm Max CPU cooler length_ up to 185 mm PSU_ without bottom fan_ 150 - 184 mm

Form Factor
Yes (5.25 Bay)
#Hide#Small Form Factor
Power Supply Wattage
Motherboard Support
Connectors / Controls
2 x USB 3.0 2 x USB 2.0 HD Audio (mic & headphone jacks)
#Hide#5.25 Bay
Drive Bays
0.8 - 1mm steel ABS plastic, 0.8mm aluminium
2 x 5.25" (removable) 7 x 3.5" (individually removable) 1 x 2.5" on motherboard tray 14 x 2.5" inside HDD slots (removable)
Expansion Slots
8 x Expansion Slots
Cooling System
Included 2 x front 140mm Pure Wing 2 Fans 1 x rear 140mm Pure Wing 2 Fan Optional 3 x top 140 / 4x 120 / 1x 180mm 1 x front 140, 120mm (w/o ODD cage) 2 x bottom 140, 120mm 2 x side panel 120mm
Liquid cooling_ Top_ 120, 140, 180*, 240, 280, 360, 420 Front_ 120, 140, 240, 280, 360, 420 Rear_ 120, 140 Bottom_ 120, 140, 280
Black and Orange