# Micro-ATX PC case releases

> Live situation record from CLSTR: https://clstr.news/situations/micro-atx-pc-case-releases
> Updated: 2026-08-01T18:00:00.000Z. Sources: 5. Developments: 2.

In late July 2026, Cooler Master introduced the Q300L V3, a $45 micro‑ATX chassis aimed at budget builders. The case features a 15.2‑inch square footprint, dual‑orientation mounting, a modular front panel with USB 3.2 Gen 2×2 Type‑C, two USB 3.2 Gen 1 Type‑A ports, and a headset combo jack, plus a rear 140 mm exhaust fan and a power‑supply mount designed for low‑profile installation.

A week later, Lian Li partnered with German designer DAN Cases to launch the B4-mATX, priced at $69.99. This chassis also supports horizontal or vertical placement but adds premium touches such as a reversible 120 mm fan basket, a semi‑concealed power‑cable connector, a single four‑pole headset combo jack, USB 3.2 Type‑A (Gen 1) and USB‑C (Gen 2×2) ports, removable filters, and optional wood‑accented trim kits. Reviewers note the case’s flexibility comes with a need for careful component planning, positioning it as a higher‑priced, more feature‑rich alternative to the earlier Cooler Master offering.

## Timeline

### 2026-08-01: Lian Li and DAN Cases Launch Versatile B4-mATX MicroATX Case

Lian Li and DAN Cases unveil the $69.99 B4-mATX MicroATX case, a dual‑orientation chassis with black, white, and wood‑trim options, supporting flexible cooling setups.

4 sources. https://clstr.news/cluster/lian-li-and-dan-cases-launch-versatile-b4-matx-microatx-case

### 2026-07-26: Cooler Master unveils $45 Q300L V3 micro‑ATX PC case

Cooler Master’s $45 Q300L V3 micro‑ATX case offers modular USB ports, flexible orientation, steel construction and a 140 mm fan, targeting budget PC builds.

3 sources. https://clstr.news/cluster/cooler-master-unveils-45-q300l-v3-microatx-pc-case

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Cite as: Micro-ATX PC case releases. CLSTR, https://clstr.news/situations/micro-atx-pc-case-releases