2.5G Dual RJ45 Port PCI-E Network Card with RTL8125B Conrtoller, QFly 2.5Gb Ethernet Adapter Card Compatible with 100/1000Mbps/2.5G, Support Windows/Linux

Card itself works fine but ran into the same issue with the low profile mounting bracket that another reviewer experienced. It seems the dimensions of the low profile bracket are off to where you can't mount the card properly with it installed (card sits an angle in the PCIe slot). Can't speak on the regular bracket since I haven't used it. This card would've been perfect had it not been for the low profile bracket issue.If seller/manufacturer can get me a replacement low profile bracket that fits properly like they did for the other reviewer, I will provide an update.UPDATE (7/12/23):After leaving my initial review, the seller reached out and offered to send me a replacement low profile bracket. Got the bracket in the mail today and it fits perfect! Thank you!

I purchased this card for an existing Ubuntu 20.04 LTS Xen server. It works great, and fits very nicely into a 1U server chassis.But, the big problem is drivers. The manufacturer download site is laughable. The only option is to download a source version of the driver, once you find it, and then rebuild the driver and your kernel to include it. It would be one thing if this was for a really old or really new OS, but Ubuntu 20?Fortunately, I found a project on GitHub (awesometic/realtek-r8125-dkms) which builds and packages the driver. All you need to do is to install DKMS, and then install the downloaded .deb file, and all is well.In summary, this is a great little card, marred by terrible driver support. Apparently Ubuntu 22.04 LTS may include RTK8125 support built-in, but for older OSs, forget it.

I couldn’t properly mount the card using the low profile bracket on an Antec ISK mini ITX case. The dimensions of the bracket seem to be off, and as a result the card is too high or tilted. I didn’t have a similar issue with an NVME to PCIe adapter so I assume it is not the case or the motherboard. I will try to use it on another PC using the regular bracket, but for the intended use it doesn’t work for me.Edit: I was approached by the seller which offered a replacement bracket. It arrived and now it’s working perfectly. Excellent service

Generally great speed performance sometimes need to reboot a seconds time to get if drivers to load but all in all a solidly built card that fits very snugly beneath a RTX 4090

Using this for a direct connection between two computers as well as internet access after an onboard NIC died. Picked up instantly by Linux with no extra config needed. I haven't tested throughput on both channels at once but transfers between the two computers are definitely 2.5gbps.