SUPERMICRO CSE-216BE2C-R920LPB Black 2U Rackmount Chassis 920W high-efficiency AC-DC Redundant power supplies with PMBus and I2C Motherboard Compatibility: E-ATX and ATX Power Supply: 920W high-efficiency AC-DC Redundant power supplies with PMBus and I2C Hot-Swap Drive Bays: 24x 2.5 SAS / SATA Hot-swap drive trays SAS or enterprise SATA HDD only recommended Expansion Slots: 7x low-profile expansion slots 60mm Fans: 5x 60mm middle fan kit: MCP-320-82603-0N 80mm Fans: 3x 80mm 7000 RPM hot-swap PWM fans Dimensions (H x W x D): 3.50 x 17.2 x 24.80 (H x W x D)