Case Form Factor Mini Tower Motherboard Type Mini ITX / Micro ATX Dimensions (WxHxD) 210 x 423 x 400 (mm) 8.27 x 16.65 x 15.75 (in) I/O Panel USB3.0x1, USB2.0 x 1, Mic x 1 / Audio x 1, RGB Control Button 3.5" Drive Bay 2 2.5" Drive Bay 2+2 (converted from 3.5" drive bays) / (2 SSD trays included) Expansion Slots 4 Cooling Fan Support Front 140mm x 2 / 120mm x 3 Top 140mm x 2 / 120mm x 2 Rear 120mm x 1 (pre-installed) Maximum Number of Fans 6 Max.