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Compact white wood panelled mATX case with steel frame, horizontal or vertical orientation

Lian Li

Lian Li B4 mATX 21.3L PC Case White Wood

SKU CH-ZJB2-QGR8P

Compact 21.3 L mATX chassis supporting 358 mm GPUs, 360 mm AIOs and dual PSU formats with wood front panel and pre-installed 120 mm fans

  • TypeATX / Micro ATX Mid Tower
  • ColorWhite
  • Case MaterialSteel 4.0mm / Wood
  • Power Supply MountedTop and Bottom
  • Motherboard CompatibilityMicro-ATX
  • Dust FiltersBottom: Magnetic filter x 1

Option White Wood Panel

  • Fits mATX boards and 358 mm GPUs in a 21.3 L frame
  • Two slim 120 mm fans pre-installed for instant airflow
  • Switch between horizontal desktop and vertical tower orientation
  • Wood front panel adds a natural accent to the white steel body
  • Rotatable AC inlet and rear clearance simplify cable routing in both layouts

Compact mATX Chassis for Versatile Builds

The Lian Li B4 mATX is a 21.3-litre small form factor case designed for Micro-ATX motherboards. It accommodates graphics cards up to 358.9mm long and CPU coolers up to 166.5mm tall. The chassis supports both ATX and SFX power supplies with a maximum length of 140mm. Its dual-orientation design allows horizontal desktop or vertical tower placement to suit different workspace layouts.

Thermal Performance and Acoustic Profile

Two slim 120mm fans come pre-installed at the top to establish baseline airflow. The case offers extensive mounting points including side radiator support up to 360mm with an SFX power supply. Additional fan locations exist on the side, front, bottom and rear for 120mm or 140mm configurations depending on the PSU choice. A magnetic dust filter on the bottom simplifies maintenance without restricting intake.

Bundled Components and Practical Benefits

The pre-installed 120mm fans provide immediate cooling without separate purchase or installation effort. A rotatable AC inlet eases cable routing in either orientation while generous rear clearance keeps wiring tidy. Front panel connectivity includes USB 3.2 Type-C, two USB 3.0 Type-A ports and an audio jack for convenient peripheral access. Real wood side panels in white beech deliver a distinct aesthetic that suits both gaming and lifestyle environments.

Points forts

  • Fits mATX boards and 358 mm GPUs in a 21.3 L frame
  • Two slim 120 mm fans pre-installed for instant airflow
  • Switch between horizontal desktop and vertical tower orientation
  • Wood front panel adds a natural accent to the white steel body
  • Rotatable AC inlet and rear clearance simplify cable routing in both layouts

Caractéristiques

BrandLIAN LI
SeriesB4
ModelB4W-WD
TypeATX / Micro ATX Mid Tower
ColorWhite
Case MaterialSteel 4.0mm / Wood
Power Supply MountedTop and Bottom
Motherboard CompatibilityMicro-ATX
Dust FiltersBottom: Magnetic filter x 1
Internal 3.5" Drive Bays1
Internal 2.5" Drive Bays1
Expansion Slots4
Front PortsUSB 3.0 Type A x 2, Power Button x 1, Audio x 1, USB 3.2 Type C x 1
Fan OptionsTop: 120mm x 2 (Pre-installed)
Side (With SFX PSU) 120mm x 3 / 140mm x 2
Side (With ATX PSU): 120mm x 2 / 140mm x 2
Front (With SFX PSU ONLY): 120mm x 1
Bottom: 120 mm x 3 / 140mm x 2
Rear: 120 mm x 1
Radiator OptionsSide - Up to 360mm
120mm Fans2
Max GPU Length358.9MM
Max CPU Cooler Height166.5MM
Max PSU Length140 mm
Dimensions47.6*26.6*36.3CM
Weight13.45

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Questions sur cet article

Will a 358 mm graphics card fit with the pre-installed top fans in place?

Yes, the case allows up to 358.9 mm GPU length and the two 120 mm top fans are already installed, so no extra clearance calculation is needed.

Can I install a 360 mm radiator on the side if I use an ATX power supply?

A 360 mm side radiator is supported only with an SFX power supply; with an ATX PSU the side fan mounts change to two 120 mm or two 140 mm positions, so a 360 mm radiator will not fit.

What drive bays are available for adding storage later?

There is one internal 3.5 inch bay and one internal 2.5 inch bay, both accessible behind the motherboard tray for easy cable routing.

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