Supermicro SuperChassis 846BE1C-R1K28B (Black) - Rack-mountable - Black - 4U - 24 x Bay - 3 x 3.15" x Fan(s) Installed - 1280 W - Power Supply Installed - ATX, EATX, Micro ATX Motherboard Supported - 75 lb - 5 x Fan(s) Supported - 24 x External 3.5" Bay - 7x Slot(s)