HiFiber Intel X520-DA1 10GbE 1-Port SFP+ PCIe 2.0 x8 NIC Network Card

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.

Great upgrade for my synology nas

Bought this to go into my PC to link to a Synology NAS via a Unifi XG Switch. It all just works without any messing with anything.Running windows 10 latest build.

Came well packaged and worked great if you have the right equipment. Recommend.

Never seem to see a consistent throughput with this.My test includes 10g nics each side with NVME drives and i7 cpus.Usually only gets to 6Gbps, occasional spike to 8Gbps.

Good product

What an absolute waste of time. No driver for windows 11 and absolutely rubbish. Requested return after wasting over one day of life.

I must say, that thise netcard are pretty good and are just working right out of the box.CachyOS (Arch Linux) found the card right away, no driver install needed. I got two of them, and have bought a pair of DAC Cables and have made direct connection between my PC. All I needed was to setup local ip adresse and up and running in no time. I used 10.0.0.1 for port 1, 10.0.0.2 for port 2, Gateway 10.0.0.10 and DNS 10.0.0.10, on the other card, I used 10.0.0.3 and 10.0.0.4 and again 10.0.0.10 for DNS and Gateway. If you want, you can either use bridge or bond to combine both ports on one of the netcard, so you instead of 10GbE get 20GbE out of the cards! Use arch wiki for how to or even just ask ChatGPT. Just remember, if you want to bind two ports to become 1, that this shall ONLY be done for 1 of the cards.I really recommend this under rated cards. Buy them and enjoy the fun with either 10GbE or 20GbE networking the EASY WAY.

Regardless of which combination of PCI-e slots and settings I used, I wasn't able to get this above 3gbps even using fibre cables and transceivers. Returned it and gave up.

Super

Plug and play thank you! Works great. Had only problems with the tp-link Alternative and tried fixing it for weeks. Happy I returned it and bought this one.

April 28, 2026 Update: I've been using these network cards from OPNsense version 23.7.10_1-amd64 through version 26.1.2-amd64 with no problems. The performance and reliability have been superb.Original December 31, 2023 Review: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/B089CWVHX4I 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.