I have run MD8.2 with one realtech 8139C for a long time without problem. I inserted a new card and it makes it crash... running a while and then just stops, I cant move the mouse and type anything... just have to restart the computer.
I removed the card and it runs again.
Laboring with 8139too and rtl8139 wouldn't work...

(
Reinstalled it with MD9.1 and one card, it was working fine.
Installed the other card and guess??? yes it crashed!
What shall i look for????