Quote Originally Posted by Ross77 View Post
I'm looking for the best option for the motion control cards and software. is there a performance benefit of a pci card over an Ethernet?

To me the Ethernet option looks neater (Mesa 7I76E) but is there more chance of interference on the cable?
I guess by PCI you mean parallel port? Ethernet is far better but depends on the software you use. I am using Mach3 and UCCNC with the UC300ETH which is great.