ZIP GSX Versions?

Hi,

Thought i would be the first to post here :-). I have a couple of ZIP GSX cards which are version 1.0.1 without the logic chips (just nothing there, no sockets etc). The cards work fine and have upgraded them to more cache and speed. Currently at 12.5Mhz. I have seen cards that are 1.0.2 with logic chips and just wondered what the real difference was between the versions?

Cheers
Drew