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A comment on 10Gb/s Ethernet: switching to a Broadcom SFP+ module. Parent comment

Re:10Gb/s Ethernet: switching to a Broadcom SFP+ module by tiffanyh on Tuesday June 16, 2026 @05:53PM (#48562683)
> ethernet at 10gbit/s and its really high consumption and heat

Do you mean Ethernet cables get hot? Or just the networking equipment pushing that data.

I ask because I’ve never heard of Ethernet cables getting hot.

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Re:10Gb/s Ethernet: switching to a Broadcom SFP+ module by gerdesj on Tuesday June 16, 2026 @06:20PM (#48563002)
PoE++ can get warm but you wont be doing that with fibre!

Before specifying fibre everywhere I suggest you note that a CAT 6 cable can manage 10G and PoE++. Its a lot more resilient to breakage too, especially outside the data centre.

If you really want to blow some cash there is CAT6A, which is probably not indicated unless you want cable lengths of more than say 50m.

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Re:10Gb/s Ethernet: switching to a Broadcom SFP+ module by AshamedCaptain on Wednesday June 17, 2026 @06:34AM (#48568350)
No, the transceivers get hot. This is because of plenty of small metal surfaces, so even if they do not consume too much they will immediately get warm to the touch.
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