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Realtek's $10 tiny 10GbE network adapter is coming to motherboards later this year
(www.tomshardware.com)
this post was submitted on 23 May 2025
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Right?! Most affordable 10G switches are SFP+ which requires a lot more research to make sure you get the right modules and cabling.
A lot of those modules would work fine if the companies didn't fuck with their drivers.
The Linux ixgbe driver (for Intel 82598 and 82599 chipsets) was submitted with a whitelist for Intel SFP+ adapters. Linux devs added a module option to shut off the whitelist, and tons of stuff is perfectly compatible.
Cisco c3850-12x48u is about $150 on eBay.
The main problem is the idle power consumption. About 150w with nothing plugged in.
Yeah, that power consumption is a non-starter. Even assuming a relatively modest $0.15/kWh, that's ~$200/year, and just for a switch. 10GbE is nice, but I'm not convinced it's worth that much. 2.5G is plenty for a fraction of the power draw.
Not to mention the fans volume.
Just use DACs within the rack. Single mode fiber patches and SFP+ optics are also cheap and easy to find.
DACs are great, agreed. However try telling that to the guy next door. The reason ethernet got to be so popular was because of how familiar it was and similar it us to telephone wire. There were several other competing standards befofe ethernet won.
10GbE cards and switches help regular folk upgrade without needing to learn about DACs.
Always amazes me how few people seem to know about DACs. I use them extensively in racks. They're inexpensive and easy to use.