Raijintek introduced the Arcadia III MS4 (mesh) ATX mid-tower case. Its designers tried to strike a balance between clearance for large graphics cards, and long water cooling radiators mounted along the front panel, and taking advantage of the large mesh intake. The case offers clearance for CPU coolers up to 165 mm in height, graphics cards up to 36.5 cm in length (with a radiator occupying the front intake); and motherboards that are ATX (or smaller). The case features a conventional horizontally partitioned layout.

Cooling options on the Raijintek Arcadia III include two 140 mm or 120 mm top exhausts, three 140 mm or 120 mm front intakes, a 120 mm rear exhaust, and two 120 mm along the base of the motherboard compartment. Radiator sizes supported are up to 280 mm x 140 mm along the top panel, up to 360 mm x 120 mm or 280 mm x 140 mm along the front; and up to 120 mm along the rear. The bottom compartment holds room for a PSU that's up to 22 cm in length, and drive mounts that include up to two 3.5-inch drives, and three 2.5-inch mounts (one above the 3.5-inch drive cage, and two behind the motherboard tray). The case features magnetically detachable dust filter along the top, and regular ones along the front and bottom, which are held in place mechanically. The case doesn't include any fans except a basic rear exhaust. The case measures 210 mm x 410 mm x 485 mm (WxDxH).