InWin expands W-series with dual-chamber W31 fishtank case

After its CES 2026 reveal, InWin has officially announced the W31. This mid-tower chassis aims to balance a compact footprint with the high-end “panoramic” aesthetic currently dominating the market.

The W31 (via Cowcotland) features a seamless curved tempered glass panel that wraps around the front and side, secured by a single thumbscrew for tool-less access. Despite its relatively modest dimensions of 460 x 285 x 400mm, the chassis is claimed to support full ATX motherboards, including the increasingly popular back-connector designs like Asus BTF and MSI Project Zero.

The internal layout features a dual-chamber design to isolate the PSU and storage drives behind the motherboard tray, maximising airflow to the primary components. Cooling appears to be a major focus, as the W31 is supposed to support up to ten 120mm fans. Out of the box, it ships with four pre-installed fans: a single 120mm exhaust at the rear and three reverse-blade 120mm fans along the side intake. While liquid-cooling enthusiasts can mount a 360mm radiator at the top or bottom, potential builders should note that side-mounted radiator support is limited to 240/280mm due to height constraints.

Hardware compatibility remains generous for a case of this size. It can accommodate graphics cards up to 410mm long, power supplies up to 240mm long, and CPU air coolers up to 160mm tall. Connectivity is handled by a top-mounted I/O panel featuring a 20Gbps USB-C 3.2 Gen 2×2 port, two USB-A 3.0 ports, and dedicated controls for the integrated ARGB lighting hub.

KitGuru says: The InWin W31 seems to be a well-considered addition to the panoramic case market, particularly for those who want the “fishtank” look without sacrificing desk space.

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