Subject: iMac Pro's NBase-T Ethernet with support for 1Gb, 2.5Gb, 5Gb, and 10Gb port's performance Hi there.... I'm about to deploy 10GbE networking in the office and will be using an iMac Pro (iMP) having the 10Gb Ethernet port. I've been told and understand that some people using this 10Gb ethernet port aren't seeing the expected 10G speeds and that they are not any better than 5G. The issue appears to be that Apple has made their 10Gb ethernet port be 10GNbase-T ethernet and not the 10GBase-T ethernet. In order to get the full or better than 10GNbase-T speeds one needs to use 10GBase-T and one way to get this is to connect a Sonnet Echo Express box to one of the iMP's TB3 ports and install a 10GBase-T PCIe card in it. So what I'm thinking of doing is this.... 1) Use a Sonnet Echo Express III (Thunderbolt 3 Edition) that has room for three PCIe Cards. Only need one PCIe slot really, but having an extra two covers any future need for additional PCIe cards we may need. This enclosure appeared to be priced at $499, PART NO. ECHO-EXP-SE3-T3 at http://www.sonnettech.com/product/echoexpressse3.html 2) Install a Dual port PCIe P2E10G-2-T card with the Intel X540 Chip in the Sonnet enclosure. Prices seem to range from $400 to $500 for this card. 3) Use shielded Cat7 cables for networking to a 10GbE switch. Cat7 cables from OWC are at a reasonable cost. Question(s) 1. For people using the stock/native 10GNbase-T port in their iMP, what speeds are you seeing ? 2. For people that have connected a Sonnet enclosure + PCIe Intel card (as described above) to their iMP's TB3 port, what speeds are you seeing ? 3. Will I need special software driver code for this Sonnet+PCIe card or will the stock High Sierra 10.13.4 have the necessary driver code already ? 4. If I need special driver code where would I obtain that from ? Thanks for any feedback on this 10GNbase-T vs. 10Gbase-T aspect.