Hi, right now, the active 7m cable is not in the support matrix the the 3750X...only passive. The only way to know if it works is to try it....
Exemple : the Panduit active cable are not supported but works on the 5000 and 5500 platform but not on the 7000. They can't even provide the same level of support across platform. HP, Qlogic, emulex, cisco, they are all acting the same...
I have yet to test my different cable vendor on my flex...
I'll check if I have a 10G module for my 3750X in my lab...but I think they are all in the feild.