Post #1275569
2026-03-24 13:59 UTC
@funkylab @manawyrm @ann3nova If you have SFP+ anyway, surprisingly the power draw is much higher for copper. 10GBaseT sucks about 2-3W while even an LR 10G optic will often consume less than one Watt.
(also something to be mindful of in high-density applications, the dissipated head adds up more than one would think)
Replies (1)
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@funkylab@mastodon.social 2026-03-24 14:06
@nblr @manawyrm @ann3nova yeah, I mean, my workstation has 2.5-GBase-T on motherboard, but I do have an Intel X520-2 for talking to SDRs, which I'm currently not using. From knowing people who used that specific card in battery-powered devices, I do get the feeling that card specifically isn't the most energy-efficient end-to-end, but I haven't done a loopback test (X520 port A - SFP+ - 10-GBase-SR - SFP+ - port B, all artificially set to 1000Base speed) with a power meter for the whole system.