be quiet! Light Base 900
Expert rating8.5 / 10
- Case Type:
- Full-Tower
- GPU Clearance:
- 495mm
- Included Fans:
- 4x 140mm Light Wings
- Max Radiator Top:
- 420mm
- Front USB-C:
- Yes
Consumercarts is reader-supported. Learn more
Disclaimer: The price and specification of the given product may differ from the actual product. Please confirm on the retailer's website before buying.
Manufacturer: be quiet! Last updated: 2026-09-12
Where to buy
- be quiet!Go to store
be quiet! Light Base 900 (Full-Tower ATX/E-ATX/Tempered Glass Front & Side/4x Light Wings ARGB Fans/420mm Radiator Support) Review
be quiet! built the Light Base 900 for people searching for a Dark Base Pro 901 alternative that leans into RGB and glass instead of the Dark Base's more understated look.
Same massive interior and 420mm radiator support as the Dark Base line, but with glass on the front instead of a solid dampened panel and ARGB fans instead of plain ones, aimed squarely at showcase builders rather than the silent-PC crowd. Its 420mm radiator mounts are top and bottom; the glass front takes no radiator.
Room to Grow
68 liters of interior volume means E-ATX boards, 420mm top or bottom radiators and multiple drives all fit without the tight tolerances smaller cases require.
Lighting and Looks
Four 140mm Light Wings ARGB fans and full glass front and side panels put the build on display, addressable through be quiet!'s software or most major motherboard RGB ecosystems.
Comparison to Alternatives
Against the be quiet! Dark Base Pro 901, the Light Base 900 swaps the Pro 901's modular dampened panels and premium price for a glass-forward look at a more accessible cost, with similar radiator support. Against the be quiet! Pure Base 500DX, the Light Base 900 is a much larger full-tower with significantly more radiator and GPU headroom, while the 500DX stays a compact, budget-friendly mid-tower.
Specifications
Identity
| Brand | be quiet! |
|---|---|
| Model | Light Base 900 FX |
Design
| Motherboard Support | E-ATX, XL-ATX, ATX, Micro-ATX, Mini-ITX |
|---|---|
| Case Type | Full-Tower |
| Panel Type | Tempered glass side and front |
Clearance & Cooling
| GPU Clearance | 495 mm |
|---|---|
| CPU Cooler Clearance | 190 mm |
| Included Fans | 4 |
| Front USB-C | Yes |
Class and layout
| Case Volume | 68 L |
|---|
Motherboard support
| Max Motherboard Size | E-ATX |
|---|
Component clearance
| PSU Max Length | 225 mm |
|---|
Power supply
| PSU Form Factor | ATX |
|---|
Liquid cooling
| Max Radiator Top | 420 mm |
|---|---|
| Max Radiator Side | 360 mm |
| Max Radiator Bottom | 420 mm |
Fan support
| Included Fan Count | 4 |
|---|
Storage and expansion
| 2.5in Bays | 4 |
|---|---|
| 3.5in Bays | 1 |
| Expansion Slots | 8 |
Panels and materials
| Side Panel Material | Tempered Glass |
|---|---|
| Front Panel Material | Tempered Glass |
Front I/O and display
| Front USB-C Spec | USB 3.2 Gen 2 |
|---|---|
| Front USB-A Ports | 2 |
| Dimensions | 532 x 327 x 465mm (L x W x H, excl. stands) |
|---|---|
| Source URL | https://www.bequiet.com/en/case/5290 |
Expert Review
Reviewed by Burooj Alam. Rated by us, not by users.
Expert rating8.5 / 10
A great full-tower for anyone who wants Dark Base Pro-level capacity with a brighter, glass-forward look at a lower price.
Best for
- E-ATX workstation or high-end gaming builds
- 420mm custom loop or large AIO setups
- Showcase builds wanting maximum interior volume
Not for
- Small desks or limited under-desk space
- Anyone prioritizing silence over looks
- Compact mATX or Mini-ITX builds
FAQs
What are the key specifications of the be quiet! Light Base 900 (Full-Tower ATX/E-ATX/Tempered Glass Front & Side/4x Light Wings ARGB Fans/420mm Radiator Support)?
The be quiet! Light Base 900 (Full-Tower ATX/E-ATX/Tempered Glass Front & Side/4x Light Wings ARGB Fans/420mm Radiator Support) is a PC case from be quiet!. Key specs: Motherboard Support E-ATX, ATX, Micro-ATX, Mini-ITX, Case Type Full-Tower, Panel Type Tempered glass front and side, GPU Clearance 435, CPU Cooler Clearance 190.
Will the be quiet! Light Base 900 (Full-Tower ATX/E-ATX/Tempered Glass Front & Side/4x Light Wings ARGB Fans/420mm Radiator Support) work with my current setup?
The be quiet! Light Base 900 (Full-Tower ATX/E-ATX/Tempered Glass Front & Side/4x Light Wings ARGB Fans/420mm Radiator Support) lists Motherboard Support is E-ATX, ATX, Micro-ATX, Mini-ITX. Check that against the hardware you already own before buying, since this is the field that most often decides whether a part fits.
Who is the be quiet! Light Base 900 (Full-Tower ATX/E-ATX/Tempered Glass Front & Side/4x Light Wings ARGB Fans/420mm Radiator Support) best suited to?
It suits e-atx workstation or high-end gaming builds, 420mm custom loop or large aio setups, showcase builds wanting maximum interior volume.
What are the drawbacks of the be quiet! Light Base 900 (Full-Tower ATX/E-ATX/Tempered Glass Front & Side/4x Light Wings ARGB Fans/420mm Radiator Support)?
It is a poor fit for small desks or limited under-desk space, anyone prioritizing silence over looks, compact matx or mini-itx builds.
Compare and read more
- be quiet! Light Base 900 (Full-Tower ATX/E-ATX/Tempered Glass Front & Side/4x Light Wings ARGB Fans/420mm Radiator Support) vs Montech Air 1000 Premium (Mid-Tower ATX/Full Mesh Front/4x 140mm ARGB Fans/Dual 360mm Radiator Support)
- be quiet! Light Base 900 (Full-Tower ATX/E-ATX/Tempered Glass Front & Side/4x Light Wings ARGB Fans/420mm Radiator Support) vs Phanteks NV7 (Full-Tower E-ATX Support/Frameless Tempered Glass/3x 140mm D-RGB Fans Included/Massive Radiator Support)
- Asus ROG Hyperion GR701 (Full-Tower E-ATX Support/Convertible Dual-Chamber Glass/3x 140mm ARGB Fans Included/Showcase Flagship) vs be quiet! Light Base 900 (Full-Tower ATX/E-ATX/Tempered Glass Front & Side/4x Light Wings ARGB Fans/420mm Radiator Support)
- be quiet! Light Base 900 (Full-Tower ATX/E-ATX/Tempered Glass Front & Side/4x Light Wings ARGB Fans/420mm Radiator Support) vs Cooler Master NR200P (Mini-ITX SFF/Tempered Glass Side Panel/2x 120mm Fans Included/Vertical GPU Ready)
- be quiet! Light Base 900 (Full-Tower ATX/E-ATX/Tempered Glass Front & Side/4x Light Wings ARGB Fans/420mm Radiator Support) vs Corsair 6500X (Full-Tower ATX/E-ATX Support/Dual-Chamber Panoramic Glass/3x RGB Fans Included)