Intel Server Chassis SC5600BRPNA For S5520SC S5520HC & S5500HCV Server boards. Support for 6 3.5" Fixed or Hot-swap SAS/SATA drives 3 fixed non redundant chassis fans Non-Redundant high-efficiency 670W PS Tool-less features Front Connectors 2xUSB & 1xOptions front or rear serial port. (Harlan Creek Platform)