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Comment by jfb

19 hours ago

Yeah, 10Gb ethernet runs hot. I just rewired the house with 10Gb (we have 8Gb FTTP) and it's kind of upsetting how hot my Thunderbolt dock gets.

I looked in to it and it seemed like 10gbit was much better over fiber. Ended up deciding that 2.5gbit is plenty. The 2.5 gear is significantly cheaper and runs cool.

  • Yeah, I use DAC for the desktop and fibre between floors. It's just the Mac's desktop that uses RJ45 copper.

  • > I looked in to it and it seemed like 10gbit was much better over fiber.

    Yes, except that most devices use Ethernet. So, at the end of the day, you still need Ethernet cables unless you want to deal with an additional switch or converter in every room.

    • Indeed, that's largely why I decided 10gbit at home isn't really worth it. The current 10gbit ethernet stuff is expensive and power hungry, the enterprise stuff is hard to use on consumer gear. And the only real use case is super fast access to a nas.

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    • > every room

      I disagree with that for two reasons. First, my central switch is probably capable of both copper and fiber. Second, how many wired devices do you have spread around your house? Let's say I have an above average number of devices: a router, a NAS, two access points, and three desktops. Router, NAS, and one access point can all be adjacent to the switch and avoid any conversion hassle. The desktops are using fiber so no conversion hassle there. That leaves one copper cable or converter needed for the other access point.

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    • If you have a fixed computer or NAS, stop making excuses and install a 10G fiber card in it.

      If you have a laptop or TV it probably doesn't need 10G.

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I redid everything that matters in my house/homelab with DAC cables for exactly that reason. Order of magnitude difference in watts and heat

Hopefully short-run 10GIGE-T might get cooler with better DSP, but for long runs I think it will remain fibre.

> it's kind of upsetting how hot my Thunderbolt dock gets.

I have seen the same with just usb-c multi-port dongles for macbooks (the ones they give you at work along with the macbooks).

in fairness to the docs/dongles though, they have an incredible amount of features that would have been science-fiction twenty years ago.