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£141.65 ex. vat

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Be Quiet Dark Base 900 Orange ATX Case

  • PSU form factor ATX PS/2
  • Motherboard compatibility E-ATX, XL-ATX, ATX, M-ATX, Mini-ITX
  • Expansion slots x 8
  • 3 Years Warranty

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QuickFind: 752377

Mfr part code: BG010

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    Be Quiet Dark Base 900 Orange ATX Case Product Description

    Be Quiet Dark Base 900 Orange ATX Case

    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 â€" 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


    High-end workstations and desktop PCs

    High-resolution gaming and multimedia systems

    Extremely overclocked systems

    Super silent water-cooled PCs

    Feature Details

    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 â€" Top: 420mm â€" Back: 140mm â€" 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


    PSU form factorATX PS/2

    Motherboard compatibilityE-ATX, XL-ATX, ATX, M-ATX, Mini-ITX

    Case size excl. stands (L x W x H), (mm)-

    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 Orange

    Weight (kg)14.18

    USB 2.0  2

    USB 3.0  2

    HD Audio I/O  1

    Expansion slots  8

    Fan mounting locations  12

    Qi charger -

    RGB LED illumination -


    CoversABS, Aluminium

    Side panelSteel, ABS

    Side panel window-

    Front panelABS, Aluminium


    Drive Bay Capacity

    5.25 x 2

    3.5 x 7

    2.5 x 15

    HDD Cage Specifications

    HDD cages total  7

    Cage capacity (HDDs)  1

    Removable HDD cage  7

    Relocatable HDD cage  7

    Pre-installed Fans

    Fan @ front2x be quiet! SilentWings 3 |140mm PWM / 1,000rpm

    Fan @ rear1x be quiet! SilentWings 3 |140mm PWM / 1,000rpm

    Dimensions (L x W x H), (mm)Front: 140 x 140 x 25, Rear: 140 x 140 x 25

    Fan speed @ 12V (rpm)1,000

    Noise level @ 12V (dB(A))15.5

    Air flow @ 12V (cfm / m3/h)59.5 / 101.09

    Air pressure @ 12V (mm H2O)1.08

    Voltage range (V DC)5 - 13.2

    Input power (W)3.6

    Input current (A)0.3


    Lifespan (h / 25°C)300.000

    Fan controllerManual stepless fan controller (3x 4-pin, 3x 3-pin)

    Optional Fan Installation

    Front (mm)1x 140 (w/o ODD cage)

    Top (mm)3x 140 / 4x 120 / 1x 180 / 1 x 200

    Bottom (mm)2x 140/120

    Side panel (mm)2x 120

    Optional Radiator Installation

    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 channelFull circuit airflow system

    PSU Compatibility

    Maximum dimensions excl. bottom fan (mm) 284

    Maximum dimensions incl. bottom fan (mm) 150

    Graphics Card

    HDD cage (in height of graphics card) installed (mm) 323

    HDD cage (in height of graphics card) removed (mm) 472

    Be Quiet Dark Base 900 Orange ATX Case Product Reviews

    Technical Specifications


    Cooling System Front: 140 x 140 x 25 mm fan x 2 / 1000 rpm / 59.5 cfm / 15.5 dBA / SilentWings 3 ¦ Rear: 140 x 140 x 25 mm fan x 1 / 1000 rpm / 59.5 cfm / 15.5 dBA / SilentWings 3 ¦ Front: 120/140 mm fan mount x 1 ¦ Top: 120/140/180 mm fan mount x 4 / 4 x 120 mm or 3 x 140 mm or 1 x 180 mm fan supported ¦ Bottom: 120/140 mm fan mount x 2 ¦ Side: 120 mm fan mount x 2
    Form Factor Mid tower
    Max Mainboard Size Extended ATX
    Supported Motherboards ATX, microATX, Mini-ATX, Extended ATX, XL-ATX
    Internal Bays Qty 8
    Front Accessible Bays Qty 2
    Product Material Aluminium, steel, ABS plastic
    Colour Orange
    CPU Cooler Max Height 185 mm
    Video Card Max Length 470 mm
    System Cabinet Features Screwless drive bays, side panel dust filter, removable dust filter, vibration damping, front dust filter, water cooling holes, cable management system, removable HDD cage, bottom dust filter, airflow channels

    Manufacturer Warranty

    Service & Support Limited warranty - 3 years
    Service & Support Details Limited warranty - 3 years

    Expansion / Connectivity

    Expansion Bays 2 (total) / 2 (free) x front accessible - 5.25" ¦ 1 (total) / 1 (free) x internal - 2.5" ¦ 7 (total) / 7 (free) x internal - 3.5"
    Expansion Slots 8
    Interfaces 2 x USB 3.0 ¦ 2 x USB 2.0 ¦ 1 x headphones - mini-jack ¦ 1 x microphone - mini-jack


    Compliant Standards RoHS 2011/65/EU


    Power Device No power supply

    Dimensions & Weight

    Width 24.3 cm
    Depth 57.7 cm
    Height 58.5 cm
    Weight 14.18 kg

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