Cooler Master Cosmos Alpha E-ATX Full Tower Case

The Cooler Master Cosmos Alpha (C700-KGNN-S00) is a full-tower PC cabinet built for enthusiast builders who demand extensive cooling flexibility and wide hardware compatibility. Rooted in the iconic Cosmos series lineage, the Cosmos Alpha introduces Cooler Master's FreeForm 2.0 platform — a modular internal architecture that gives builders genuine control over layout and airflow without compromise. At the core of the Cosmos Alpha's design is a sliding motherboard tray that allows builders to reconfigure the internal space quickly, making it straightforward to switch between air and liquid cooling setups. An adjustable sliding fan bracket complements this by letting you position fans closer to heat sources, optimising airflow for any configuration. Cooling headroom is a strong point: the chassis ships with three pre-installed fans — two 200×38 mm fans at the front and one Mobius 120×25 mm fan at the rear. The case supports a maximum of 15 fans across front, top, rear, bottom, and side-mount positions. Radiator compatibility extends to 420 mm on the side mount, 360 mm on both top and bottom, making it equally suited to compact 240 mm AIO builds and triple-radiator custom-loop configurations. Hardware compatibility is broad. The Cosmos Alpha accepts Mini-ITX, Micro-ATX, ATX, E-ATX, and EEB motherboards, accommodates graphics cards up to 400 mm in length, and supports CPU coolers up to 186 mm tall. ATX power supplies with a maximum length of 240 mm are supported. Eight expansion slots are available, while tool-free drive bays can hold up to two 2.5-inch or two 3.5-inch drives (configuration-dependent on CPU cooler height). The front I/O panel offers four USB 3.2 Gen 1 Type-A (5 Gbps) ports and two USB 3.2 Gen 2×2 Type-C (20 Gbps) ports alongside a 3.5 mm headset jack — a generous connectivity selection for day-to-day use. Top and bottom dust filters help manage dust ingress over time. The exterior uses tempered glass and metal construction in a Black and Silver finish, and included accessories comprise a VGA card holder, a decorative cover, and a right-side cable cover. Verified Specifications: • Form Factor: Full Tower • Motherboard Support: Mini-ITX / Micro-ATX / ATX / E-ATX / EEB • Dimensions (incl. protrusions): 669 × 330 × 639 mm • Volume: 88 L (without panels/protrusions/feet); 140 L (with panels/protrusions/feet) • Pre-installed Fans: 3 (2× 200×38 mm front, 1× Mobius 120×25 mm rear) • Maximum Fan Support: 15 fans • Max Radiator Support: 420 mm (side mount) • Max GPU Length: 400 mm • Max CPU Cooler Height: 186 mm • Max PSU Length: 240 mm • Expansion Slots: 8 • Drive Bays: Up to 2× 2.5" or 2× 3.5" (configuration-dependent) • Front I/O: 4× USB 3.2 Gen 1 Type-A 5G, 2× USB 3.2 Gen 2×2 Type-C 20G, 3.5 mm audio • Dust Filters: Top and Bottom • Material: Tempered Glass and Metal • Colour: Black and Silver • Warranty: 2 Years