> yes, well you can get a cheap transceiver for that. Yes, exactly. I feel like you haven't finished your thought ;) If you have a SFP+ slot, you can plug in

> yes, well you can get a cheap transceiver for that. Yes, exactly. I feel like you haven't finished your thought ;) If you have a SFP+ slot, you can plug in a cheap SFP+ 10Gbase-T transceiver. Or a SFP+ fiber transceiver. Or a DAC cable. If you have a 10Gbase-T port, you're stuck and need to buy and power a switch (or, recently, media converter) to get to anything else. And you're now wasting power for 2 10Gbase-T PHYs that are completely pointless for a very short link. Of course you'll be using a bunch of 10Gbase-T for anything where you have existing copper runs that are good enough quality to actually run 10Gbase-T. I'm just saying (1) you shouldn't be using 10Gb-T for cabling things that are next to each other, and (2) you shouldn't be running copper cabling for new installations that you're building explicitly to get 10G over.