Gen - 3
8gbps
24-port 8Gbps modules - 96-Gbps/slot b/w - 3 ports per port group.
48-port -8Gbps modules - 96-Gbps/slot b/w - 6 ports per port 
4/44 port 8-gbps - 48-Gbps/slot b/w - 12 ports per port