Brand: Bequiet | PC CasesBequiet PC Casesbe quiet! Dark Base 900 Midi Tower Black

be quiet! Dark Base 900 Midi Tower Black

We Price Match!
If you have seen this product cheaper, we would love to try and match or better the price.  Click here to submit a price match.
All prices include VAT
+ Free UK Delivery
- WAS -
Save £36.64 (0%)
RRP £233.99
be quiet! Dark Base 900 Midi Tower Black | In Stock Feefo Quzo Reviewsbe quiet! Dark Base 900 Midi Tower Black | In Stock TrustPilot Quzo Reviews
Seen this cheaper? If you have seen this product cheaper, we will do our best to match or better the price. Click here to submit a price match.
Brand New, only 10 left in stock!
» FREE UK Delivery
between Wednesday, 28 April to Friday, 30 April.
» Expedited Delivery available for Monday, 26 April.
See details and conditions
General Information

General Information for Be Quiet

be quiet! Dark Base 900, Midi Tower, PC, Black, ATX,EATX,Mini-ITX,XL-ATX, ABS synthetics, Aluminium, Steel, 18.5 cm

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 &Ndash; 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 &Ndash; Top: 420Mm &Ndash; Back: 140Mm &Ndash; 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:
(0) 40-736 76 86 - 98


Manufacturer Supplied Images
Please note, these images are supplied by the manufacturer and are for illustration purposes only. If you have any queries about this product, please contact us and we will be happy to help.

Buy be quiet! Dark Base 900 Midi Tower Black with PayPal

Buy be quiet! Dark Base 900 Midi Tower Black online with confidence, security and peace of mind. All transactions are covered under the PayPal Buyer and Seller Protection programme.

Buy be quiet! Dark Base 900 Midi Tower Black with PayPal

Best Sellers Rank

#134 in PC Cases

Supplied With
  • 100% Genuine Product
  • Quzo 21 Day Returns Policy - T&C Apply
  • All Official Packaging
  • All Applicable Guarantee(s)
  • Instruction Manuals and Documentation (where applicable)
  • Email when item is despatched.
Popular Related Products

Dark Base 900

Further details for this product, Dark Base 900, can be found at the manufacturer website. Please note, these web addresse(s) are supplied by 3rd parties, Quzo is not responsible for the content.

Dark Base 900, EATX/XL-ATX/ATX/M-ATX/Mini-ITX, 2x 5.25", 7x 3.5", 15x 2.5", 3x SilentWings 3 140mm PWM fans, 2x USB 3.0, 2x USB 2.0, 14.2 kg, Black

be quiet! Dark Base 900. Form factor: Midi Tower, Type: PC, Product colour: Black. Supported power supply form factors: ATX. Front fans installed: 2x 140 mm, Front fans diameters supported: 120,140 mm, Side fans diameters supported: 120 mm. Supported HDD sizes: 2.5,3.5". Width: 243 mm, Depth: 577 mm, Height: 585 mm

Warranty information: 3-year manufacturer’s warranty

Initial Release Date: 16/06/2016

Product Specification

be quiet! Dark Base 900 Midi Tower Black Specifications

Manu. Code
Weight (approx)
Product TypePC Cases
Technical details
Collection Model
Be Quiet Dark Base 900
Form Factor
Midi ATX Tower
Midi Tower
Product colourBlack
Supported motherboard form factorsATX,EATX,Mini-ITX,XL-ATX
Number of 5.25" bays2
Number of 3.5" bays7
Number of 2.5" bays15
Number of expansion slots8
Side windowN
Anti-dust filterY
Fan speed1000
Maximum CPU cooler height18.5 cm
Maximum graphics card length47 cm
Maximum PSU length18.4 cm
Maximum CPU cooler height185
Maximum graphics card length470
Maximum PSU length184
Supported HDD sizes
Ports & interfaces
USB 2.0 ports quantity
USB 3.0 (3.1 Gen 1) Type-A ports quantity2
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity2
Audio InputY
Audio OutputY
Power supply included
Front fans installed
2x 140 mm
Number of front fans supported (max)3
Front fans diameters supported120,140 mm
Number of side fans supported (max)2
Side fans diameters supported120 mm
Rear fans installed1x 140 mm
Number of top fans supported (max)4
Top fans diameters supported120,140,180 mm
Number of bottom fans supported (max)2
Bottom fans diameters supported120,140 mm
Liquid cooling capabilityY
Front radiator fan sizes supported120,140,240,280,360,420 mm
Rear radiator fan sizes supported120,140 mm
Top radiator fan sizes supported120,140,240,280,360,420 mm
Front fans diameters supported120,140
Side fans diameters supported120
Top fans diameters supported120,140,180
Bottom fans diameters supported120,140
Front radiator fan sizes supported120,140,240,280,360,420
Rear radiator fan sizes supported120,140
Top radiator fan sizes supported120,140,240,280,360,420
Weight & dimensions
243 mm
Depth577 mm
Height585 mm
Weight14.2 kg
ABS synthetics,Aluminium,Steel
ABS synthetics, Aluminium, Steel
ABS synthetics, Aluminum, Steel
Power supply
Supported power supply form factors
Packaging data
Package width
325 mm
Package depth655 mm
Package height680 mm
Package weight16.3 kg
Colour of productBlack
Maximum front fans3
Maximum side fans2
Maximum top fans4
Maximum bottom fans2
Supported hard disk drive sizes2.5,3.5
Returns & Exchanges

21 Days Return Policy

We want you to be delighted every time you shop with us. Occasionally though, we understand that you may wish to return items.

Items can be returned direct to us within 21 days from the day of dispatch for a refund or exchange.

To qualify for this, the product must not have been worn, and be in brand new condition. You must return all the original packaging, instructions, guarantee and any extras.

All technology / electrical items including but not restricted to TVs, laptops, tablets etc must be still in their original packaging with the manufacturer seals still in tact. We are unable to accept returns for products which have been opened and/or used.
Product Questions

Questions and Answers
There has been no questions asked about this product.
Ask a question
You can ask a question about this particular product and we will email you the answer. The answer will then be posted here to assist other shoppers.

Click here to ask a question about this product.

be quiet! Dark Base 900 Midi Tower Black Reviews

Customer Reviews

Share your thoughts with other customers

Write a customer review

Quzo Gold Trusted Service Award 2021
Quzo Gold Trusted Service Award 2020
Help & SupportSupport Centre
Opening Hours
Mon - Thursday (9:30am - 5:30pm)
Friday (9.30am - 1.30pm)
Closed Saturday
Closed Sunday
Contact Details
Kemp House, 158 City Road
United Kingdom
020 365 79723

VAT Number: ​ 267 7554 58