Athena Power RM-1UWIN525 USB 3.0 Multiple Drive Bay Configuration 1U Rackmount Server Classis - up to ATX (9.6 x 9.6) M/B -OEM Motherboard Compatibility: MicroATX (9.6 in. x 9.6 in.) ATX (12 in. x 9.6 in.) Mini-ITX (6.7 in. x 6.7 in.) Power Supply: FlexATX Single (not included) Expansion Slots: Full-High x 1 Front Ports: 1 x Front 2-Port USB 3.0 40mm Fans: 4 x Front 40mm Internal 2.5 Drive Bays: 2 x Internal 3.5 / 2.5 HDD Dimensions (H x W x D): 1.75 x 17.13 x 15.47