10Gtek 10Gb PCI-E NIC Network Card, Single Copper RJ45 Port, with Intel X550-AT2 Controller, PCI Express Ethernet LAN Adapter Support Windows Server/Linux/ESX, Compare to Intel X550-T1

Context: I'm on a daily-driven Fedora (v44 on KDE) desktop. My current MB's NIC is a "Marvell AQtion AQC113C". My ISP speed at the wall is 2Gbps up/down. While the AQC113C worked, there appeared to be a known-bug specifically with Aquatic (Marvell branded) NICs when your speed is set to 2.5GbE on Linux systems. After a few days, the controller essentially gets corrupted and i have to reboot the system. That's frustrating as the system is used for local network AI inferencing, transcoding videos as a Tdarr node, and I often SSH/remote into it when I'm away. I need the machine on and available. I read this Intel controller has a good history of reliability on linux systems so that's why I picked it The review: Speaking for the X550-10G-1T model - Installed on a PCIe 4x slot. The notes from the seller are correct 2500/5000 speeds will need manual adjustment first but will work. Screenshot 1 is the "ethtool enp6s0" output. Note the red square those options didn't show until I ran a "nmcli connection modify" change and rebooted. Blue square shows speed I set. 2nd screenshot is the X550 controller. ISP speed test returned favorable at expected speeds 2234mbps down / 2091mbps up. So far the built-in driver is working well. Besides the manual 2500 adjustment, it was technically a plug-in-play experience. The small card fits as expected. 10gig is overkill for my intended use but I wanted "future proofing" and reliability

Works perfectly. Downloaded driver from intel site. Functions identically to other intel X550 cards which are much more expensive. If you have a PCIx8 available the X540 is better priced and the same performance(except less power efficiency) but I only had a x4 slot. The Aquantia AQC107 cards are also x4 and much cheaper but their performance is bad unless you enable jumbo frames which isn't supported by my router, and latency & jitter & impracticality of configuring every device makes me question if it would be worth enabling even if it did.

I bought this in hopes it would work in my Synology DS1517+ - and IT WORKED! Straight out of the box, plug and pray worked - have it connected to a Netgear GS110MX switch that has 2 10Gbit RJ45 ports and it is working great at 400-500MBps without any optimization. I would have been using the latest DSM as of this writing so drivers exist in that DSM. Much lower cost than what the official compatible 10000BaseT cards are listed at Synology. So far so good.

I previously had a cheaper 10gb Network card with a bright red heat sink, but it was very flaky - constantly going down. It eventually took the entire desktop off the network. This installed easily and has not been a problem since. Strong network connections. Drivers automatically downloaded and installed. Just a note, this is card is using my Dell PCIe 4x port - the only one available. Working flawlessly.

Running in Freenas 11.3 server - get 10Gbit (mtu 9000) performance in either direction x550 <-> negear gs110mx <-> Aquantia aqn-107 Works very well - stable thus far.