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Lian Li B4-mATX 21.3L PC Case, 358mm GPU, 360 AIO, 2 Slim Fans, White Wood | 2 Pre-Installed 120mm Slim Top Fans, Supports 360mm AIO, 140mm ATX PSU, Horizontal/Vertical Setup, Small Form Factor (B4W-WD)
Lian Li

Lian Li B4-mATX 21.3L PC Case

Bottom line: The Lian Li B4-mATX 21.3L PC Case is an ATX case with 2 fans pre-installed; it fits graphics cards up to 358mm long and a 360mm radiator (manufacturer spec).

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By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014, focused on GPU performance across gaming, rendering, and local-LLM inference. Synthesises community benchmarks, manufacturer specs, and public forum data into actionable buying guides.

Pros & Cons

Pros

  • ✓ 2 fans pre-installed
  • ✓ Fits graphics cards up to 358mm long and a 360mm radiator (manufacturer spec)

Cons

  • ✗ 358mm GPU clearance rules out some of the longest triple-fan cards, a few of which run past 350mm; check your card's length
  • ✗ Price, stock, shipping and returns are set by the retailer and may have changed since this page was last updated

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SpecPicks Verdict

SpecPicks scored Lian Li B4-mATX 21.3L PC Case using a rating × review-volume × price-fit model applied to published specs and reviews across the pc cases category. Lian Li's pc cases lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for pc cases of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Key Features

  • Pre-installed Fans: Comes with two slim 120mm non-RGB fans for immediate cooling out of the box.
  • Elegant Aesthetic with Premium Real Wood Finish: Available in black walnut or white beech wood finishes for a stylish look.
  • Strong Hardware Compatibility: Supports mATX motherboards, GPUs up to 358mm, and CPU coolers up to 168mm tall.
  • Dual Positioning: Use horizontally for a desktop blend or vertically for a space-saving tower design.
  • Supports up to a 360mm AIO with SFX PSU and accommodates ATX PSU (max 140mm) for flexible fan and radiator options.

Full Specifications

BrandLian Li
ColorWhite Wood
MaterialSteel 4.0mm, Wood(Walnut/Beech)
Case TypeMid Tower
Model NameB4W-WD
Unit Count1 Count
Model NumberB4W-WD
CompatibilityPC
Cooling MethodAir
Number of Fans2
Mfr Part NumberB4W-WD
Antenna LocationGaming, Personal Computer
Dual PositioningUse horizontally for a desktop blend or vertically for a space-saving tower design.
Compatible DevicesDesktop, Power Supply: ATX (Up to 140mm) / SFX
Enclosure MaterialSteel 4.0mm, Wood(Walnut/Beech)
Pre-installed FansComes with two slim 120mm non-RGB fans for immediate cooling out of the box.
Warranty Description1 Year Manufacturer
Supported MotherboardMicro-ATX, Mini ITX
Item Dimensions D x W x H16.02"D x 7.52"W x 11.34"H
Motherboard CompatabilityMicro-ATX, Mini ITX
Full listing titleLian Li B4-mATX 21.3L PC Case, 358mm GPU, 360 AIO, 2 Slim Fans, White Wood | 2 Pre-Installed 120mm Slim Top Fans, Supports 360mm AIO, 140mm ATX PSU, Horizontal/Vertical Setup, Small Form Factor (B4W-WD)

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Lian Li B4-mATX 21.3L PC Case, 358mm GPU, 360 AIO, 2 Slim Fans, White Wood | 2 Pre-Installed 120mm Slim Top Fans, Supports 360mm AIO, 140mm ATX PSU, Horizontal/Vertical Setup, Small Form Factor (B4W-WD) is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

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Lian Li B4-mATX 21.3L PC Case, 358mm GPU, 360 AIO, 2 Slim Fans, White Wood | 2 Pre-Installed 120mm Slim Top Fans, Supports 360mm AIO, 140mm ATX PSU, Horizontal/Vertical Setup, Small Form Factor (B4W-WD)
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