Workstation or GamingSupports both SSI-CEB/SSI-EEB server boards as well as ATX boards such as XL-ATX/E-ATX/ATX/mATX/mITX for versatile build options. Cooling SupportFans: 18x140mm/120mm, Radiators: AIO up to 420mm/DIY up to 560mm, Air Coolers up to 190mm. Multi-GPU Expandability8+2 PCIe Expansion Slots for multi-GPU up to 360mm (with HDD Rack) 630mm (without HDD Rack) in length. GPU Brace included with 4 adjustable supports. Plentiful Storage Up to 18 HDD Trays for drives 3.5' or 2.5' in size. Twelve located in main chamber cages and an additional 6 trays behind the M/B Tray. Stackable ExpansionIncrease Storage, Cooling and Power options with the AX100 Pedestal which can be mounted on the bottom and/or top of the chassis. (AX100 Sold Separately)