Athena Power RM-3UG3164HE12 Black SGCC (T=1.2 mm) 3U Rackmount Server Case Motherboard Compatibility: MicroATX (9.6 x 9.6) ATX (12 x 9.6) E-ATX (12 x 13) Mini-ITX (6.7 x 6.7) Expansion Slots: 8 full-height PCI expansion slots External Slim Drive Bays: 1 x Slim Optical Drive Bay 120mm Fans: 2 x 120mm DC Cooling Fans Internal 2.5 Drive Bays: 2 x 2.5 HDD Drive Bay Dimensions (H x W x D): 5.25 x 17.32 x 25.00 Weight: 25.00 lbs.