4 Ports 2.5G PCIe Network Card, RTL8125B LAN Controller, 2500/1000/100Mbps RJ45 Ethernet NIC Adapter, Support PXE for Windows/Linux

These cards work well at a reasonable price

Plug and play, very stable, cheap and works pretty well over stress, never had a single problem! MAKE SURE YOU INSTALL THE DRIVER!!!

Works great, noticed an increased snappiness to the computer.

I tested this in 3 different machines. One of my ASUS motherboards had an issue that when you initially started the machine, the PCI-E was not active. This is NOT the fault of the card but the fault of the motherboard. For me to get the machine to boot fresh with the card active I was required to disable the onboard ethernet adapter. If you intend to use the onboard adapter and this adapter doublecheck reviews of your manufacturers motherboard before blaming the manufacturer of this board. To ensure you have setup the card properly. When you first install this, windows will install a default driver. I would double check the card works as expected by doing speed tests if you have internet speeds at 2.5Gbps. If you do not have those speeds you can setup iperf3 server and client and run a speed test between 2 computers. A poor mans version of this is to copy a large file from computer A to computer B. But if you do the copy file trick, you must ensure you hard drive speeds are at or above the 2.5G speeds. Some SSDs cap out at 100Mbs. Drives rated at 6G or 600Mbs likely will never run at those speeds. So keep that in mind when doing speed tests with data. If you noticed you are not getting expected speeds for the adapter. I would recommend downloading the realtek drivers from realtek. Once installed, you can change the adapter settings in the Device Manager to used 2.5G instead of the default often set to 1.0G. You may also want to turn on Jumbo frames. But in doing so check your router's capabilities for jumbo frames. Some routers will limit or restrict jumbo frames so keep that in mind. If turning on Jumbo frames and you speeds decrease you likely are having issues with your router. Some manufacturers, especially those with all 2.5G ports usually turn this feature on by default. Overall, after testing in 3 different machines. I plan to use this in my gaming PC. I can finally upgrade my internet speeds and take advantage of it for both my server and my gaming PC. A worthy upgrade in my mind since my day job includes having fast and reliable internet connection.

Great for a lil diy router, really good quality and couldn't be easier to install. It's always nice to have extra hardware included, and I need it for a my low profile computer build, and no extra cost is always good!

If you're looking at this item and wondering if it will work with your QNAP NAS (TVS-hx74 specifically), it does. Trouble-free install from the get-go, worked immediately and has been great for over a year. The first thing I did before install, since this is installed upside down (with the heatsink facing down and not up), was to remove the heatsink and corresponding thermal pad and replace with a small bead of Arctic Silver 5, then reinstall the heatsink. My only complaint now is that this card is $20 cheaper than when I purchased 😢.

I hoped it would work in my Mac Pro with Ventura 13.7.8, but I was wrong. I wasn't able to install a driver and it was not recognized automatically.

This lan card works as advertised, however you will need to update your drivers as the generic drivers only connect at 2.5gb. Once your drivers are updated from the Realtek site, you will experience 5gb speeds. Happy with the price, performance and ease of use.