Lian Li O11 Dynamic XL ROG Certified is the newest and greatest upgraded version of the very popular O11 Dynamic. Once again designed with the collaboration of Germany's famous Der8auer, the O11 Dynamic XL is bigger in every way (depth, height, and width) to further increase its possibility of water-cooling capabilities by providing more space for thicker radiators as well as taller GPU water blocks. Dimensions: (W)285mm x(H)517mm x(D)490mmMaterial: Tempered glass on the front , and left sides . Aluminum top, and right side panelExpansion Slot : 82. 5” SSD : 113. 5” HDD : 4 (HOT SWAP)I/O Ports : USB3. 0 x4, USB3. 1 x1, HD Audio , and ARGB controller in the frontM/B Type : EEB(35. 5cm x 35. 5cm) / ATX / Micro-ATXSystem Fan: 3×12 cm fans or 2x 14 cm fans on the top. (option) , 3x 12 cm or 2 x 14 cm fans on the bottom (option) , 1 x 12 cm fan options / 3 x 12 cm fans on the side (option)PSU : ATX PSU x 3 (Optional)