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2.5GBase-T PCIe Network Adapter RTL8125B 2500/1000/100Mbps PCI Express Gigabit Ethernet Card RJ45 LAN Controller Support PXE for Windows/Linux/MAC with Low Profile

Free shipping on orders over $29.99

$19.99

$ 8 .99 $8.99

In Stock

About this item

  • Compatible for X1,X4,X8,X16,Comes with low profilce bracket
  • Driver link was changed,pls freely download here. Driver link: https://www.realtek.com/Download/Index?cate_id=194&menu_id=368
  • Support PXE function an Wake on LAN
  • Support DSM,PVE,ikuai,unraid6.9.2, OpenWrt ESXI6.7 (Doesn’t support ESXI 7.0)
  • Freely compatible, the network card can support multiple system: Windows ME/98SE/2000/XP, Win7 / Win8 / Win10 / Vista / Sever 2003/2008 / 2012 /2016/ Linux / DOS/MAC OS



Product Description

Suitable for Host Server and Personal PC

Suitable for Host Sever and Personal PC

PCI Express RTL8125B 2.5G network adapter is combines a four-speed IEEE802.3 compatible Media Access controller with a four-speed Ethernet transceiver, it is complies with the IEEE802.3u specification for 10/100Mbps Ethernet,the IEEE802.3ab specification for 1000Mbps Ethernet and IEEE802.3bz specification for 2500Mbps Ethernet.

Product Feature.

It offers high-speed transmission over CAT5e UTP cable OR CAT3 UTP(10Mbps only)cable .it is suitable for multiple market segments and emerging applications, such as desktop, workstation, server, communications platforms, and embedded applications.

Specification

Chipset:RTL8125B

Port number:1* RJ45

Standard:IEEE 802.3、IEEE 802.3u、IEEE 802.3ab、IEEE 802.3az、IEEE 802.3bz

Network media:10Base-T,cat3 or above UTP,1000Base-Tx,cat5 or above UTP

Data rate:PCI Express 1x slot

Auto MDIX:YES

Full Duplex Support:YES

LED Indicator:100M/1G/2.5G Link/Act

Dimension:71.5*50*1.6mm

Support OS:Windows 10(32/64), Win7 (32/64), Win8,8.1 (32/64),Windows Server,2012,2008,Linux,Mac OS

Support PXE function.

Support Wake on LAN

Support 2.5G and 1G Lite mode

Compatible with NBASE-T Alliance PHY Specification

Supports PCI Express 2.1

Supports 1-Lane 2.5G/5Gbps PCI Express Bus

Compliant with IEEE 802.3,IEEE 802.3u,IEEE 802.3ab

Supports IEEE 802.1P Layer 2 Priority Encoding

Supports IEEE 802.1Q VLAN tagging

Supports IEEE802.3az(Energy Efficient Ethernet)

Supports IEEE802.3bz(2.5GBASE-T)

Supports Full Duplex flow control(IEEE 802 .3x)

Packing list

1xPCIE 2.5G LAN Card

1x Low profile Bracket


Robyn Simmons
2025-08-22 10:49:21
I couldn't be happier with this network adapter! It was incredibly easy to install—literally plug and play. I didn't have to deal with complicated drivers or troubleshooting, which made the whole process a breeze.Once installed, it worked perfectly. My internet connection has been fast and stable, with no drops or interruptions. Whether I'm streaming, gaming, or just browsing, it performs flawlessly.For the price, this adapter is a steal, and it’s been a great upgrade for my setup. Highly recommend it for anyone looking for a hassle-free, reliable network adapter!
James Thomas Greenia
2025-08-14 11:17:44
I recently purchased the 2.5GBase-T PCIe Network Adapter with RTL8125B chipset, and it has been a game-changer for my home network. This little powerhouse of a network card has made a significant difference in my data transfer speeds and overall network performance.Installation was a breeze, as the card fits perfectly into a PCIe slot on my motherboard. The drivers were easy to find and install, and I was up and running in no time. I was pleasantly surprised by the compatibility and stability of this card with my system.The most impressive aspect of this network adapter is, of course, its speed. The 2.5 Gigabit per second throughput is a substantial upgrade from my previous 1Gbps network card. I've noticed a significant improvement in file transfer speeds, online gaming, and 4K video streaming. Whether I'm transferring large files or enjoying lag-free online gameplay, this card has consistently delivered.The RTL8125B chipset seems to be doing a fantastic job in managing network traffic. I haven't experienced any connectivity issues, and it's been rock-solid since I installed it. It also supports various advanced features like Wake-on-LAN, which is a handy addition for remote management.Additionally, this network card remains cool and doesn't heat up excessively, even under heavy usage. It also features an efficient power management system, which is great for energy-conscious users.In conclusion, the 2.5GBase-T PCIe Network Adapter with the RTL8125B chipset is an excellent addition to any PC or server setup. If you're looking for a cost-effective way to upgrade your network speeds and improve overall network performance, this card is a solid choice. I couldn't be happier with my purchase, and I highly recommend it to anyone looking to make the leap to faster networking speeds without breaking the bank. Kudos to the makers of this fantastic product!
Theresa Miller
2025-08-10 16:40:03
Works great and the drivers were easy to install..no issues
Jonah Chapman
2025-07-31 11:00:28
Card itself actually works really well for the price, was getting about 1192 download and 175 upload which is about the correct speed for my network. But for some big reason it was causing VBAN errors on voicemeeter Potato. I tried a few different things and I just couldn't figure out the issue.
Chadnic
2025-07-22 11:37:55
I've been using this card for quite a while before writing this review and I can say for the cost, this card is worth it. I get a full 2.5Gbit when connected to a 10G network and the card has no problem with flaking out, dropping packets or getting squirrelly even over transfer that take sever days. The card keeps outputting like it's supposed to even under full load for extended periods of time.One thing I will note is that it runs extremely hot, so just make sure you have good airflow over the surface of the card and it will be fine. I am sure if you didn't have good movement of air you might run into a problem where the card overheats, but I never had this issue personally because I just made sure it wasn't crammed right up against another card and there was no problem!Hope you found this useful!
James H
2025-06-28 21:56:21
Smaller than expected but fit the PCIe slot, connected easily.
Chris Virgilio
2025-06-01 18:49:32
Purchased this NIC and it arrived the same day! Absolutely outstanding. The install was so simple it left me wondering why other products aren’t as simple. Windows 11 immediately recognized the card as a 2.5GbE device and started negotiating a connection. Within a minute or so I was surfing the web and stabling my onboard NIC. This is perfect for quickly moving files are a fast local network (either home or small business) and getting a little bit more punch out of any networked storage solution. Is it the answer if you’re looking to work with massive video files or a huge batch of photos? No, Not in a live scenario, anyway. For that you’d want to bump up to a 10GbE device. All of the new motherboards are coming with at least a single 2.5GbE connection now as they are so cheap, as I is evidenced by this unit, and ‘multi-gig’ is a term that is going to gradually start creeping into our internet vernacular soon as well. Get prepared and bring your old grandma board into the modern era!Disclosure: you will need to have a device on the other end of your magical-internet-machine cable that is also meant to handle speeds of at least 2.5Gb/s as well, otherwise this card’s speed won’t pay off.
Jeffrey S.
2025-05-28 17:30:42
These are well engineered - they present a brief pause for a configuration option that would make it easy to employ network boot options then they're up & on their way. 2.5Gb speed with no need to find / add a driver.
Joe B
2025-05-24 13:32:35
Easy to hook up to a pci slot and didn’t have to update my motherboard .
Gerber Hanspeter
2025-05-03 10:51:46
tut was sie soll
MIKE59
2025-04-05 17:14:06
Très pratique pour augmenter le débit RJ45
Dave
2025-02-24 14:24:05
It works, around 250mb transfer, far better than the old archaic 100mb
RayMad
2025-01-30 15:13:03
It Does the JOB!
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