Cooler Master QUBE 340 M-ATX Mini Tower Case

The Cooler Master QUBE 340 is a Micro-ATX mini tower chassis engineered around Cooler Master's Thermal Excellence philosophy, prioritising airflow and practical hardware compatibility within a compact footprint. Its front panel features enlarged mesh perforations that channel air directly to internal components, working in tandem with a rear 140 mm exhaust position to move heat efficiently out of the system. This makes it a sensible choice for builders who want strong thermal headroom without stepping up to a full mid-tower. Inside, the QUBE 340 supports motherboards in Micro-ATX and Mini-ITX form factors, so it adapts naturally to a range of build configurations. The chassis accommodates graphics cards up to 366 mm long (when no front fan is installed), enabling the use of modern, higher-end discrete GPUs. CPU air coolers up to 178 mm tall fit comfortably, meaning popular twin-tower and single-tower coolers are fully compatible. Power supplies up to 200 mm are supported when the bottom fan slot is left empty, or up to 140 mm with a bottom fan fitted. The fan ecosystem is extensive for this chassis class. Up to six fans can be installed across four zones: two 120 mm or 140 mm positions on the top, two 120 mm or 140 mm at the front, one 120 mm or 140 mm at the rear, and one 120 mm or 140 mm at the bottom. Radiator support extends to 240 mm at the front and top, and 120 mm at the rear. Dust filters are fitted at the top, front, and bottom to reduce maintenance intervals. The front I/O panel includes a USB 3.2 Gen 1 Type-A port, a USB 3.2 Gen 2×2 Type-C port, a 3.5 mm mic input, and a combo audio jack — a well-specified selection for a case in this segment. Storage provision covers one 3.5-inch HDD bay, one 3.5-inch/2.5-inch combo bay, and two dedicated 2.5-inch SSD positions, for a maximum of four 2.5-inch drives. Cable management is aided by 30 mm of routing space behind the motherboard tray, keeping the main chamber tidy. The QUBE family's modular design DNA is present in flexible front I/O placement and mounting points for optional handles and 3D-printed accessories. The chassis ships with one pre-installed fan. Verified Specifications: • Form Factor: Micro-ATX Mini Tower • Supported Motherboards: M-ATX, M-ITX • Colour: Black • Materials: SGCC steel, tempered glass, mesh • Max CPU Cooler Height: 178 mm • Max GPU Length: 366 mm (no front fan) • Max PSU Length: 200 mm (no bottom fan) / 140 mm (with bottom fan) • Fan Support: Up to 6 × 120/140 mm (top ×2, front ×2, rear ×1, bottom ×1) • Radiator Support: 240/120 mm top & front; 120 mm rear • Expansion Slots: 4 • Drive Bays: 1 × 3.5", 1 × 3.5"/2.5" combo, 2 × 2.5" (max 4 × 2.5") • Front I/O: USB 3.2 Gen 1 Type-A, USB 3.2 Gen 2×2 Type-C, audio combo, mic • Dust Filters: Top, Front, Bottom • Pre-installed Fans: 1 • Warranty: 2 Years • SKU: Q340-KGNN-S00