. Model Name MX331 Mesh Case Form Factor Mid-Tower Dimension (WxHxD) 204 x 481 x 443 (mm) 8 x 19 x 17 (in) Motherboard Type Mini ITX / Micro ATX / ATX 5.25" Drive Bay 1 3.5" Drive Bay 2 2.5" Drive Bay 2+2 ( converted from 3.5" drive bays ) Expansion Slots 7 I/O Panel USB 3.0 x 2, USB 2.0 x 2, Mic x 1 / Audio x 1, Reset Button Maximum Number of Fans 5 max. Cooling Fan Support Front 120mm x 2 Top 120mm x 2 Rear 120mm ( pre-installed ) Water Cooling Support Front 240mm / 120mm Top 120mm Rear 120mm Transparent Left Panel Yes Max. Graphics Card Length 350mm / 13.8 (in) (Horizontal graphics card slots are compatible with RTX 3090/3080/3070.) Max. CPU Cooler Height 155mm / 6.1 (in) Max. PSU Length 200 (mm) / 7.9 (in)