Asrock 90SSXG6X0-A0120000A RM23724-C622LM 2U; 1+1 Socket for 2nd Gen. Intel Xeon; 24 Hot-swap 2.5" drive bays + 4 Hot-swap 2.5'' drive bays (rear) ; Mezzanine LAN card; 2-port 12Gbps* and 2-port PCI