Chassis SC745 User's Manual 1.3 System Features The following table provides you with an overview of the main features of the SC745. System Features Chassis SC745 Drives Bays Up to eight 2.5" or 3.5" internal hot-swap drive bays and three 5.25" external drive bays Cooling Three 8-cm, 4-pin PWM mid-chassis fans; two 8-cm exhaust fans; one airflow shroud (-SQ models have two 8-cm fans and one 9-cm fan for super quiet performance) Expansion Slots Seven PCIe full-height slots Form Factor 4U tower; optional rack mounting rails Dimensions (WxHxD) 17.8 x 7.0 x 25.5 in. (452 x 178 x 647 mm) 8