SUPERMICRO CSE-836TQ-R500B Black 3U Rackmount Server Case 500W high-efficiency redundant power supplies with PMBus Motherboard Compatibility: 13.68 x 13 Power Supply: 500W high-efficiency redundant power supplies with PMBus Hot-Swap Drive Bays: 16 x 3.5 Hot-swap SAS Drive Bays Expansion Slots: 7 x Low-profile expansion slots Front Ports: 2 x USB Ports & DB9 COM Port 80mm Fans: 3 x 80mm Hot-swap PWM Fans 2 x 80mm Rear-exhaust Fans Dimensions (H x W x D): 5.2 x 17.2 x 25.6 (H x W x D)