Number of 5.25 bays: 2406993 Usb 3.2 gen 2 (3.1 gen 2) type-c ports quantity: 2332320 Number of rear fans supported (max): 1 Usb 3.2 gen 1 (3.1 gen 1) type-a ports quantity: 1 Bottom fans diameters supported: 120 mm