DIGITUS DN-10136, four-port 2.5-gigabit server card on a Realtek RTL8125B
four RJ45 sockets · 10/100/1000/2500BASE-T · PCIe 2.1 · Realtek RTL8125B in the description · no lane count, brackets or OS
A four-socket 2.5-gigabit server card whose Amazon.com page is a title and a description: PCIe 2.1, four RJ45 ports and a Realtek RTL8125B chipset, with no lane count, brackets or operating systems.
Best for: A server or a router build that needs four 2.5-gigabit sockets from one slot, once the lane count has been confirmed with the maker.
≈ $92