Lian Li DAN B4 Mesh Black Micro Tower Gaming Case
3899 EGP
- Part Number: G99.B4X.00
- Form Factor: 21.3L Micro-ATX | Horizontal & Vertical Layouts | Steel & Mesh Construction
- Compatibility: Supports M-ATX/ITX | GPU up to 358mm (4-Slot) | CPU Cooler up to 165mm | ATX (140mm) or SFX PSU
- Cooling: 360mm Radiator Support (with SFX PSU) | 2x Pre-installed 15mm Slim Top Fans | Up to 9 Fan Slots
- Features: Rotatable AC Power Connector | Removable Front Bracket for Easy GPU Install | USB 3.2 Type-C (20Gbps)
- Warranty: 1 Year
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Lian Li DAN B4 Mesh Micro Tower Gaming Case
Co-developed with DAN Cases, the Lian Li DAN B4 Mesh is a compact 21.3L micro-ATX case that delivers exceptional hardware compatibility. Supporting M-ATX motherboards, 358mm 4-slot GPUs, 140mm ATX PSUs, and 360mm radiators, the B4 offers unparalleled flexibility in a compact footprint. Available in mesh or wood panel variants with horizontal or vertical layout options — build like never B4.
358mm GPU
360mm AIO
Vertical/Horizontal
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Key Features
📐 Compact 21.3L with Broad Compatibility
With a compact 21.3L volume, the B4-mATX delivers impressive hardware compatibility, supporting M-ATX motherboards, 360mm AIOs, 140mm ATX PSUs, and up to 358mm 4-slot GPUs.
🎨 Minimal Design — Multiple Styles
Choose between a clean mesh panel for an airflow-focused look or a real wood panel for a warmer, refined setup. Both support front-to-back airflow, balancing cooling performance with a streamlined exterior.
↕ Vertical Mode — Maximized Desk Space
The vertical layout improves desk space efficiency by up to 30%. Integrated rear feet allow quick and easy switching between horizontal and vertical modes.
💧 Up to 360mm Radiator Support
With an SFX power supply, the B4 supports 360mm, 280mm, and 240mm radiators on the side. With an ATX PSU, it supports 240mm radiators. The rotatable AC inlet adapts to both orientations.
🌀 Pre-Installed 15mm Slim Fans
Two pre-installed 120×120×15mm slim fans on the top provide enhanced cooling performance. Operating up to 1800 RPM, they are daisy-chained to reduce cable clutter.
🌬️ Extra Intake — Better Cooling
Supports a 120×120×15mm slim front fan with an SFX PSU and GPU under 343mm long, helping improve intake airflow. Supports up to 9 fans across top, side, bottom, rear, and front.
Technical Specifications
Cooling Configurations
💧 Recommended Liquid Cooling
360/280mm AIO Setup:
- SFX PSU + M-ATX motherboard
- 3× Bottom fans
- 2× Top slim fans (pre-installed)
240mm AIO Setup:
- 140mm ATX PSU + M-ATX motherboard
- 3× Bottom fans
- 2× Top slim fans (pre-installed)
- 1× Rear fan
Note: Fans must be installed outwards when using liquid cooling.
🌬️ Recommended Air Cooling
159mm Air Cooler Setup:
- SFX PSU + M-ATX motherboard
- 3× Bottom fans, 1× Side fan, 1× Rear fan
- 1× Front slim fan, 2× Top slim fans
165mm Air Cooler Setup:
- 140mm ATX PSU + M-ATX motherboard
- 3× Bottom fans, 1× Rear fan
- 2× Top slim fans (pre-installed)
Note: Front fan flipped to intake for optimal airflow.
Is the DAN B4 Right For You?
✓ Best For
- Compact mATX builds with high-end components
- Users wanting 360mm AIO support in a small footprint
- Builders who prefer vertical or horizontal layouts
- Those who value mesh or wood panel aesthetics
- Gamers needing 358mm 4-slot GPU support
Consider Alternatives If
- You need ATX motherboard support (mATX only)
- You want back-connect motherboard support
- You require more than 2 storage drives
- You prefer glass panel aesthetics (mesh or wood only)
Common Questions
What motherboards does the DAN B4 support?
The B4 supports Micro-ATX and Mini-ITX motherboards. It does not support back-connect motherboards.
What GPUs fit in the DAN B4?
The B4 supports GPUs up to 358mm in length and up to 4 slots thick. It includes a pre-installed GPU anti-sag bracket for stability.
Does the B4 support 360mm radiators?
Yes. With an SFX power supply, the B4 supports 360mm, 280mm, and 240mm radiators on the side. With an ATX PSU, it supports 240mm radiators.
What power supplies fit in the B4?
The B4 supports ATX power supplies up to 140mm in length, as well as SFX power supplies.
Does the B4 support vertical orientation?
Yes. The B4 supports both horizontal and vertical layouts. The vertical mode improves desk space efficiency by up to 30%.
What’s In The Box
| MODEL | |
|---|---|
| CASE SIZE | |
| PANEL | |
| Motherboard Type | |
| FANS INCLUDED | |
| Expansion Slots | |
| Fan Support | |
| Radiator Support | |
| GPU Length | |
| CPU Height | |
| PSU SUPPORT | |
| Pre-installed PSU | |
| I/O Ports | Power button, 1x Audio out, 1 x USB 3.2 Type-C, 2x USB 3.0 TYPE-A |
| 3.5“ Drive Bays | |
| 2.5 Drive Bays | |
| Color | |
| Part Number | |
| Warranty |
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