>Made the connections again using the same color code on both ends.
Which color code? Or, what are the color of the wires when reading left to right with the plug up and the clip away?
>I get more good replies from the new to old PC than from the old to new PC. Is that significant?
Yes. Please answer the first question.
>Could the new NIC in the old PC be bad even though it checks out as OK in the device manager?
Yes, but it isnít the likely problem. Larry