Cooler Master Q300L V3 M-ATX White Mini Tower Case

The Cooler Master Q300L V3 is a Micro-ATX mini tower PC case finished in white, part of Cooler Master's QUBE family and built under the brand's Thermal Excellence philosophy. It is aimed at builders who want meaningful cooling headroom without the bulk of a full or mid tower chassis. The front panel features enlarged mesh perforations that increase airflow intake compared to earlier Q300 generations. The rear exhaust position is upgraded to support a 140 mm fan, an improvement over the 120 mm rear found on many competing entry-level mATX cases. Combined, these choices let the chassis support up to six fans across the top, front, rear, and bottom positions, giving you genuine flexibility to tune a positive, negative, or balanced pressure configuration. A 30 mm cable routing channel behind the motherboard tray keeps wiring tidy, while the optimised fan mounting layout and improved motherboard tray contribute to a more rigid structure overall. The chassis supports vertical or horizontal placement and includes front panel mounting points compatible with 3D-printed accessories, aligning with the modular spirit of the wider QUBE ecosystem. Optional handles are available as accessories; this SKU (Q300LV3-WGNN-S00) is the handle-free Lite variant. Front I/O includes a USB 3.2 Gen 1 Type-A port, a USB 3.2 Gen 2×2 Type-C port, a 3.5 mm microphone jack, and a combo audio jack — a more capable front panel than many cases at this price point. Dust filters are fitted at the top, front, and bottom to reduce maintenance frequency. The chassis is constructed from SGCC steel, tempered glass, and mesh panels. It carries a 2-year manufacturer warranty and ships with one pre-installed fan. Verified specifications: • Form factor: Micro-ATX, Mini-ITX • Colour: White • Max GPU length: 366 mm (without front fan installed) • Max CPU air cooler height: 178 mm • Max PSU length: 200 mm (no bottom fan) / 140 mm (with bottom fan) • Fan support: Top 2×120/140 mm | Front 2×120/140 mm | Rear 1×120/140 mm | Bottom 1×120/140 mm (max 6 fans total) • Radiator support: Top 240/120 mm | Front 240/120 mm | Rear 120 mm • Drive bays: 1×3.5", 1×3.5"/2.5" combo, 2×2.5" dedicated (up to 4×2.5" total) • Expansion slots: 4 • Dust filters: Top, Front, Bottom • Pre-installed fans: 1×140 mm (non-ARGB) • Materials: SGCC, Tempered Glass, Mesh • Warranty: 2 years