RTL8125-2.5G-4T-X4

So far, so good. I installed this in the WiFi slot of my Dell Optiplex MFF running Ubuntu. Fired up just fine and is showing a 2.5 GbE connection. No need to add any drivers, presumably because the on-board NIC is Realtek.

Works as advertised:) and comes with drivers

Very niche product that works for my very specific use case. I wanted to upgrade my Lenovo M700 Tiny with some higher speed networking as it has a DAS attached storage and Unraid on it. I was able to install it in the wireless card class that was close to the power button. The very tight fit, but was able to fold the cable under the card and route it to the back. I was able to pull the PCI brackets off the Ethernet port and use the screws and holes to attach it to an unused serial slot punch out. I used a piece of electrical tape to cover the bottom of the Ethernet port PCB to keep from shorts. It looks factory! Unraid 7.1.4 picked it up without any issue and able to see 2500 Mbps connection. (Router confirms as well) Initial speed tests seem to confirm it. Hopeful that the RTL8125 will be reliable as the Intel I219-V has been. Three complaints. First is on Amazon, the packed was crushed. Luckily it was packed in a strong plastic case. Second, the cable is very short. Even in my tiny client PC, it took some creative routing. I would appreciate a bit more length on the cable. Third, please include a screw for the M.2 please. I can understand a commodity SSD not including a screw, but this is a bit more niche. Even a cheap screw driver was included. Overall, a great way to add higher speed networking to a mini PC. Unraid worked out of the box.

Perfect upgrade for my mini pc! Slotted into the unpopulated WiFi slot on my motherboard and just worked!

I had high hopes for this card especially after reading the reviews. It turned out to be very disappointing. I purchased it for my OPNsense firewall and it was ok to get the drivers installed and was easily recognized. However, I don’t even know what it does, but the firewall’s console throws some errors regarding this NIC and after ~5 the console floods with output text that you can’t see because it flashes so fast and the computer reboots. This happens constantly. Stay away from Realtek products, intel NICs are expensive for a good reason. Another issue (not a big deal) but the standard profile bracket is a bit tall for my giant tower.

I never really need wifi or bluetooth but having to use the pci slot for a 2.5gb card was annoying. This adapter freed up the slot and just gave new life to a bunch of boards. Perfect fit and detected by ubuntu and server 2022 without issue, getting 2.4gb+ speeds on downloads and file transfers.

Removed the onboard wifi from my motherboard and put this in its place so I could get the full speed of my internet/local network. Had to mount it externally due to lack of a slot. Was basically plug and play on an Unraid setup.

Put this in a Lenovo M80q, recognized immediately as a Realtek 2.5g family NIC, drivers loaded and operational in minutes. Cable length was just right for my application, yours may differ. Overall very happy with this purchase.