this post was submitted on 23 Feb 2026
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My current internet setup is like this (which is common for most people).

fiber line from ISP <-> ISP fiber modem <-> Personal wifi router <-> switch

This is working fine with no issues. But I need to power two devices. I want to reduce this to a single device.

fiber line from ISP <-> Modem+Firewall PC <-> Switch <-> AP1,AP2...

From my initial research, what I need is an SFP module which can be attached to a PC which supports SFP. OPNsense should be able to handle most SFP modules.

What is the community's take on this? Is this worth the effort? Can I find a mini-PC which supports SFP? Will it be cost effective?

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[–] FlexibleToast@lemmy.world 24 points 16 hours ago (3 children)

Those two devices are likely very low power arm devices. I wouldn't be surprised if a mini pc consumes more power than those two devices. If power is your concern you should probably measure how much they're actually pulling.

[–] xavier666@lemmy.umucat.day 3 points 12 hours ago (1 children)

This is something I completely forgot to account for. I heard that some SFP modules (10G) can consume a lot of power. I think the devices are pretty low powered. I'll have to get a smartmeter and rethink the setup. Thanks a lot!

[–] FlexibleToast@lemmy.world 1 points 5 hours ago

Older 10G SFP+ models were definitely power hungry. I think they've gotten better since then, but I haven't really looked into how much better.

[–] Onomatopoeia@lemmy.cafe 4 points 13 hours ago (2 children)

I dunno, my newest cable modem chews up a boatload of power for no good reason - really pisses me off.

It uses more power (50w) than my 2019 SFF desktop I run as a server, with an 8TB drive (20w).

I know because they both sit on their own smart switches.

[–] MagnificentSteiner@lemmy.zip 6 points 13 hours ago (1 children)

50w... holy shit!

My server with 1 SSD, 3 HDDs running multiple docker containers doesn't usually pull more than 35-40w.

My router tops out at 8w and my wireless access point at 5w IIRC.

[–] tal@lemmy.today 1 points 12 hours ago

My consumer broadband router (which acts as a WAP, modem, and router) looks like it's rated for a 36W power supply. Putting a Kill-A-Watt wattmeter on it shows it currently using about 14W.

[–] FlexibleToast@lemmy.world 2 points 13 hours ago (1 children)

I would definitely complain. That sounds defective.

[–] Onomatopoeia@lemmy.cafe 3 points 12 hours ago (1 children)
[–] pipes@sh.itjust.works 1 points 8 hours ago

Holy moly, what modem is that??

[–] hendrik@palaver.p3x.de 5 points 16 hours ago* (last edited 15 hours ago) (1 children)

Maybe correct? Though my cable modem gobbles down some 15W... Without even doing the Wifi... So, I bet this isn't a universal truth, as a Mini-PC will comsume less and provide all kinds of extra services, networking, NAS...

[–] FlexibleToast@lemmy.world 3 points 14 hours ago (1 children)

Wow, that's a power hungry modem... But, look into the power usage of those sfp modules. They can be ~10w on their own.

[–] hendrik@palaver.p3x.de 1 points 10 hours ago

Yeah, they often get quite warm. Some day I'll be in the same situation as OP. And I can't wait to throw out that supid modem. No clue, though what kind of SFP the fiber provider requires. I mean there's quite a selection available...