COOLER MASTER MB520 RGB ATX Mid Tower Cabinet (Black)

The Cooler Master MasterBox MB520 RGB is an ATX mid-tower PC cabinet finished in black, designed to balance visual impact with practical thermal management. It is built around a steel, plastic, and tempered glass construction, with the tinted DarkMirror front panel providing a sleek, reflective aesthetic that diffuses the glow of the interior lighting. Three 120mm RGB LED fans come pre-installed at the front, delivering both immediate visual appeal and meaningful front-intake airflow through the large ventilation openings on either side of the front panel. A single 120mm standard fan is pre-installed at the rear for exhaust. An RGB controller and a 1-to-3 RGB splitter cable are included in the accessory pack, so you can manage lighting even on motherboards without native RGB headers using the I/O panel Reset button. The 4mm-thick edge-to-edge tempered glass side panel showcases the build interior. Its bracket hinges outward at an angle during removal, and two captive rubber-retained screws prevent misplacement — a thoughtful quality-of-life detail for builders who frequently access the interior. The spacious interior accommodates ATX, Micro-ATX, and Mini-ITX motherboards and provides clearance for CPU coolers up to 165mm tall, graphics cards up to 410mm long, and power supplies up to 180mm in length. Cable management is handled behind the motherboard tray with 19–27mm of routing depth, while a full-length PSU shroud keeps the lower bay tidy. A GFX cable routing grommet on the PSU shroud allows clean GPU power cable runs. Storage options include two combo 3.5-inch/2.5-inch drive bays and up to six 2.5-inch SSD bays (four standard positions). There are no 5.25-inch optical drive bays. Seven expansion slots are available. The I/O panel provides two USB 3.0 ports plus audio in/out. Dust filters are fitted at the front, bottom, and top to reduce particulate ingress. The power supply mounts at the bottom in a standard ATX orientation. Verified Specifications: – Model: MCB-B520-KGNN-RGB – Form Factor: ATX Mid Tower – Dimensions: 496 mm (L) × 218 mm (W) × 468 mm (H) – Materials: Steel, Plastic, 4mm Tempered Glass – Motherboard Support: ATX, Micro-ATX, Mini-ITX – Pre-installed Fans: 3 × 120mm RGB LED (front), 1 × 120mm (rear) – Fan Support — Front: 3 × 120mm or 2 × 140mm; Top: 2 × 120mm or 2 × 140mm; Rear: 1 × 120mm – Radiator Support — Front: up to 360mm; Top: up to 240mm; Rear: 120mm – CPU Cooler Clearance: 165mm – GPU Clearance: 410mm – PSU Clearance: 180mm – Drive Bays: 2 × combo 3.5″/2.5″, up to 6 × 2.5″ SSD – Expansion Slots: 7 – I/O: 2 × USB 3.0, Audio In/Out – Dust Filters: Front, Bottom, Top – Warranty: 2 Years