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be quiet! Dark Base Pro 900
Ultimate Full-Tower Customization
The be quiet! Dark Base Pro 900 is a premium full-tower case designed for enthusiasts who demand exceptional flexibility, silence, and cooling performance. Its modular interior allows you to reconfigure the layout to suit your build, whether you're installing a massive E-ATX motherboard, a custom water-cooling loop, or multiple high-end GPUs.
Key Features
- Versatile Motherboard Support: Accommodates E-ATX, XL-ATX, ATX, Micro-ATX, and Mini-ITX boards, giving you the freedom to choose any platform.
- Massive Cooling Potential: Supports radiators up to 420mm in the front and top, and up to 140mm in the rear. Includes three 140mm Silent Wings 3 PWM fans for outstanding airflow with near-silent operation.
- Unrivaled Component Clearance: Fits GPUs up to 472mm (or 323mm with HDD cage) and CPU coolers up to 185mm tall, ensuring compatibility with the most powerful hardware.
- Flexible Storage Options: Offers 2 x 5.25" optical bays, up to 7 x 3.5" drives, and up to 15 x 2.5" drives, perfect for massive storage arrays.
- Modern Front I/O: Includes USB 3.2 Gen 2 Type-C, dual USB 3.2 Gen 1, dual USB 2.0, audio jacks, and a built-in Qi wireless charger for convenient smartphone charging.
- Premium Build Quality: Constructed from steel, aluminum, and 4mm tempered glass, delivering durability and a sleek, professional appearance.
Performance and Silence
True to the be quiet! brand, the Dark Base Pro 900 excels in acoustic performance. The included Silent Wings 3 fans are among the quietest on the market, and the case features sound-dampening materials on key panels. The result is a system that stays whisper-quiet even under heavy load.
Who Is It For?
This case is ideal for PC builders who want a top-tier foundation for their dream rig. Whether you're a gamer, content creator, or workstation user, the Dark Base Pro 900 provides the space, flexibility, and aesthetics to create a high-performance, visually stunning system.
Use Cases
- High-end gaming PCs with multiple GPUs and custom water cooling.
- Professional workstations requiring extensive storage and E-ATX motherboards.
- Silent PC builds where low noise is a priority.
Key Specifications
Motherboard Support: E‑ATX, XL‑ATX, ATX, Micro‑ATX, Mini‑ITX
Type: Full‑Tower
Total USB Ports: 2X USB 3.2 Gen 1, 2X USB 2.0, plus headphone & mic jacks; plus 1X USB 3.2 Gen 2 Type‑C on front
Weight: 14.39 kg
Radiator Compatibility: Front – up to 420 mm; Top – up to 420 mm; Rear – 120/140 mm
Drive Bays: 2 × 5.25″ optical, up to 7X 3.5″, up to 15X 2.5″
Expansion Slots: 8
Expansion Card Length: Up to 472 mm (or 323 mm with HDD cage installed)
CPU Cooler Clearance: Up to 185 mm
PSU Support: Standard ATX, up to 284 mm (150 mm with bottom fan installed)
Cooling Fan Support: Front – 3X 140 mm or 3X 120 mm; Top – 3X 140 mm or 4X 120 mm; Rear – 1X 120/140 mm; Bottom/PSU shroud – up to 2×120/140 mm
Included Fans: 3X 140 mm Silent Wings 3 PWM (2 front, 1 rear)
Chassis Material: Steel, aluminum, tempered glass (~4 mm), plastic
Dimensions (D×W×H): 577 × 243 × 586 mm
Front I/O: 2X USB 3.2 Gen 1, 2X USB 2.0, 1X USB 3.2 Gen 2 Type‑C, headphone & mic jacks, Power/Reset buttons, D‑RGB LED control, Qi wireless charger
Detailed Parameters
- Supported Form Factors:
- E-ATX, XL-ATX, Micro-ATX, ATX, Mini-ITX
- Supported PSU Form Factors:
- ATX, EPS
- Maximum GPU Length in mm:
- 472
- Maximum Cooler Height in mm:
- 185
- Maximum Radiator Length in mm:
- 420
Pros
- Extremely versatile interior with modular drive cages and reversible motherboard tray
- Excellent cooling support for large radiators up to 420mm
- Very quiet operation thanks to Silent Wings 3 fans and sound-dampening materials
- Premium build quality with aluminum and tempered glass
- Convenient front I/O including USB-C and Qi wireless charging
Cons
- Large and heavy, may be difficult to move or fit on a desk
- Price is higher than many full-tower cases
- Tempered glass side panel can be prone to fingerprints
Frequently Asked Questions
Does the Dark Base Pro 900 support E-ATX motherboards?
Yes, it supports E-ATX, XL-ATX, ATX, Micro-ATX, and Mini-ITX motherboards, offering great flexibility for high-end builds.
What is the maximum radiator size that fits in the front?
The front can accommodate radiators up to 420mm, and the top also supports up to 420mm, making it ideal for custom water cooling.
How many fans are included with the case?
The case includes three 140mm Silent Wings 3 PWM fans: two in the front and one in the rear, providing excellent airflow out of the box.
Can I install a large graphics card in this case?
Yes, you can install GPUs up to 472mm in length when the HDD cage is removed, which supports even the longest high-end graphics cards.
Does the case have a USB Type-C port on the front?
Yes, it features a USB 3.2 Gen 2 Type-C port on the front I/O panel for fast data transfer and modern device connectivity.
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be quiet! Dark Base Pro 900
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