H!Fiber.com HiFiber HiFiber for Intel 82599ES Controller 10GbE Ethernet Converged Network Adapter(NIC) X520-DA1, Single SFP+ Port PCI-E X8

This is not plug and play, you need to find the correct drivers for your OS for the Intel controller that it uses. That isn't as straightforward as it could/should be. Once set up, it certainly can work to specification but I have found some odd performance behaviours that get rectified by enabling/disabling other ethernet adaptors on my system. Very odd. But overall, I'm satisfied.

Super

I have multiple Jellyfin servers, and installed 1 10g nic in the Windows platform and 1 in the Ubuntu platform. Ubuntu connected with native drivers and Windows was an easy download, install BAM, both of these budget 10g nic's using DAC cables are getting me 300+ transfer speeds. As for how long they last, well I'll update a review if reliability becomes an issue. They do get hot when loaded for long periods, so I placed a 40mm Noctua blowing directly on just one, so if it dies, temp specifically won't be the factor. So far, a fantastic product, priced right and super fast shipping!

Installed in my PC to talk to my 10gb ubiquity agg switch. Works well, need to install the drivers from intels website before it will work.

Funziona perfettamente. Utilizzata per il mio NAS

Using a fresh OPNsense install (version 23.7.10_1-amd64) this network card was detected right away and I had no problems installing and configuring to work with OPNsense. I have two of these network cards, along with two of the SFP+ RJ45 transceivers listed below, installed in a custom PC used for a router; the transceiver worked great with this network card (I needed a transceiver that could auto-negotiate at 2.5Gb). https://www.amazon.com/dp/B089CWVHX4 I don't have a 10Gb home network setup yet, so I was only able to test up to 2.5Gb for home network; this network card worked great. I have 1Gb+ internet service and had no problem consistently achieving 1Gb+ download speeds with this network card and transceiver. I was previously having performance issues with network cards that used RTL8125B chips and I225-V chips. I saw a number of OPNsense forums mentioning these X-520/82599 based network cards are reliable, reasonably priced, and have OPNsense/FreeBSD driver support, so I wanted to try 82599 and see if that solved my performance issues. So far it has been great and I wish I would have started with this configuration instead of wasting so much money on other network adapters.