Athena Power RM-3U8G525 Black SGCC (T=1.2 mm) 3U Rackmount Server Case 2 External 5.25 Drive Bays 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) External 5.25 Drive Bays: 2 Internal 3.5 Drive Bays: 2 x 3.5 HDD Drive Bay (at Chassis Front) Expansion Slots: 8 full-height PCI expansion slots 80mm Fans: 4 x 80mm DC Cooling Fans Dimensions (H x W x D): 5.25 x 17.32 x 21.57 Weight: 25.00 lbs.