I'm in the process of upgrading my 6500 with old modules to a SUP720. I know the latest 67xx and 68xx modules offer 40gbs connections to the backplane. How about these I currently have? What kind of connectivity do they have to the backplane? If it's something in the range of 8gbps and the module has 48 gigabit ports, then each port really has a capacity of 166mbps which concerns me.
WS-X6548-GE-TX (48 port gigabit ethernet)
WS-X6408A-GBIC (8 port mixed media gigabit slots)