---
product_id: 408002582
title: "2.5G Base-T PCIe Network Adapter, Realtek RTL8125B 2.5Gbps/1Gbps/100Mbps PCI Express Gigabit Network Card Convert to Ethernet RJ45 LAN Port for Gaming/Office, Support Windows/Linux,Black"
brand: "nicgiga"
price: "$150.24"
currency: USD
in_stock: true
reviews_count: 5
category: "Nicgiga"
url: https://www.desertcart.ec/products/408002582-2-5g-base-t-pcie-network-adapter-realtek-rtl8125b-2
store_origin: EC
region: Ecuador
---

# 2.5Gbps ultra-fast speed Efficient heat sink cooling PCIe x1/x4/x8/x16 slot compatible 2.5G Base-T PCIe Network Adapter, Realtek RTL8125B 2.5Gbps/1Gbps/100Mbps PCI Express Gigabit Network Card Convert to Ethernet RJ45 LAN Port for Gaming/Office, Support Windows/Linux,Black

**Brand:** nicgiga
**Price:** $150.24
**Availability:** ✅ In Stock

## Summary

> 🚀 Upgrade your LAN game with NICGIGA’s 2.5G powerhouse — speed, style, and stability in one sleek card!

## Quick Answers

- **What is this?** 2.5G Base-T PCIe Network Adapter, Realtek RTL8125B 2.5Gbps/1Gbps/100Mbps PCI Express Gigabit Network Card Convert to Ethernet RJ45 LAN Port for Gaming/Office, Support Windows/Linux,Black by nicgiga
- **How much does it cost?** $150.24 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ec](https://www.desertcart.ec/products/408002582-2-5g-base-t-pcie-network-adapter-realtek-rtl8125b-2)

## Best For

- nicgiga enthusiasts

## Why This Product

- Trusted nicgiga brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Blazing 2.5Gbps Speeds:** Experience lightning-fast data transfers that crush 1Gbps limits for gaming, streaming, and heavy workloads.
- • **Plug & Play Versatility:** Seamlessly compatible with Windows, Linux, and Mac OS—no driver hassle on Windows 10 and easy downloads elsewhere.
- • **Cool & Stable Connection:** Advanced heat dissipation keeps your network stable and lag-free during marathon work or gaming sessions.
- • **Future-Proof PCIe Upgrade:** Transforms any PCIe slot into a powerful 2.5G RJ45 Ethernet port, ready for next-gen network demands.
- • **Sleek Black Design with Dual Brackets:** Fits perfectly in desktops, servers, or mini towers with standard and low-profile brackets included.

## Overview

The NICGIGA 2.5G Base-T PCIe Network Adapter leverages the Realtek RTL8125B chipset to deliver up to 2.5Gbps Ethernet speeds, significantly outperforming standard 1Gbps cards. Compatible with multiple operating systems and PCIe slots, it includes both standard and low-profile brackets for versatile installation. Its efficient heat sink ensures stable, cool operation, making it ideal for gamers, professionals, and anyone demanding faster, more reliable wired network connections.

## Description

NICGIGA 2.5G Base-T PCIe Network Adapter, Realtek RTL8125B 2.5Gbps/1Gbps/100Mbps PCI Express Gigabit Network Card Convert to Ethernet RJ45 LAN Port for Gaming/Office, Support Windows/Linux

Review: Out of the box this was not running at the 2.5Gb speeds (even though Windows reported it as running 2.5Gb) it was staying around 900mb with iperf3 test between 2 other machines on network that both have 2.5Gb NICs. Using the QNAP 2.5Gbe unmanaged switch for 3 PCs that all have 2.5Gbe NICs. They are segmented on their own VLAN coming from pfsense firewall appliance which also has 2.5Gbe. After updating the drivers from the Realtek site as per the pamphlet that came in the box along with a small form factor screw driver and 2 screws (using case screw to match black aesthetic) and the 2 I/O plates, then it unlocked the full menu in the interface's controller properties. Also was getting closer to the 2.5Gb speeds on local network, RDP feels smoother and stable connections without drops. There is some irregularity in the iperf3 tests though. Not getting the irregularities from 3rd PC to main PC so not sure if it's driver related or just an issue with the Realtek chipset of this card. Overall though satisfied with the price to performance and hope there will be future driver updates, not counting on it though. For what I need it to do, be a stable RDP connection it seems to be holding strong and helps not feel laggy like it did with the default 1Gb port on the X370 Taichi Mobo. This is an improvement. If you do want a blacked out PCB and the bright green LED isn't visible while doing work then this is a good 2.5Gbe card. Also make sure you get the latest driver from Realtek, out of the box is not fully unlocked. Happy packets :)
Review: In case you don't want to read the full review the short version is: Good card, worth the money, fully recommended. The problem: The first picture shows the problem: a 1Gbps connection that only reaches just over 300Mbps, with a wired connection. Having checked every piece of equipment between modem and motherboard, including running a CAT 7 cable directly between the two the problem was finally identified as a dodgy Intel chipset on the ASUS B550-F motherboard. In other words the onboard LAN was just unable to deliver the full broadband speed - and had been delivering substandard speeds for some time. The solution: pictures 2-4: a NICGIGA 2.5Gbps PCI-E card with a Realtek chipset. Why this card? Well, simply put, it has a black backplate that fits in with the motherboard's black backplates. I know, not the best reason but it also has a known chipset, a decent heatsink on the main chip, an handle over the 1Gbps bandwidth, future-proofs to a certain extent and is at good price point. (A quick note about the future-proofing: a 1 Gigabit connection can potentially deliver over 1Gbps - up to 1.3Gbps - whereas a 1Gbps card stops at 1Gbps. This card is 2.5Gbps and so will handle over 1Gbps and provides some future-proofing for when the next major speed increase comes in.) Install: was really simple: unscrew a backplate, install the card, screw in the card, close the case and plug in a CAT 7 cable bought at the same time - KINBETA high speed 10Gbps 2 metre CAT 7 flat braided cable - and switch on PC. See pictures 6-8. The result: picture 9 shows the result. As soon as the PC started the card was recognised, no driver download was needed. The download speed jumped from 321.5Mbps to 925Mbps (picture 9) solving the problem in a most elegant way. It is interesting to note that the ping was 9ms both before and after upgrading the NIC and upload also remained the same - the 52Mbps which was the expected speed and initially highlighted the problem. For those with a small form factor PC it is worth noting that a smaller backplate is provided (see picture 5) as well as a screwdriver and two screws. Overall very happy with this purchase it solved the problem at a reasonable cost and I can feel the difference the higher speed connection makes. Definitely recommend this card.

## Features

- [Super-fast 2.5Gbps Networking] High up to 2.5x-speed with Realtek RTL8125B chip, much faster data-transfer speeds for gaming, living broadcasts and downloads in bandwidth-demanding tasks.
- [Complete Compatibility] Seamless backward compatibility for 2.5Gbps/1Gbps/100Mbps, Support Windows11/10/8.1/8/7, MAC OS and Linux, no dirver needed on Windows10, easily download the driver in Realtek official website for other OS.
- [PCIe to 2.5G RJ45] This 2.5GBASE-T PCIe Network Adater convers a PCIe slot(X1/X4/X8/16) into a 2.5G RJ45 Ethernet Port. Note: Only work with PCIe slot, not for PCI slot.
- [Widely Use with Heat Sink]Comes with standard bracket and low-profile-bracket to meet the needs of different cases such as desktop, workstation, server, mini tower computer and so on. Excellent heat dissipation can reduce the temperature quickly and maintain the stability of network transmission.
- [Customer Service]Friendly service for lifetime technical supporte. If you encounter any problems, please contact us, our customer team will slove the problem for you within 24 hours.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09HGRK5XB |
| Batteries Included | No |
| Batteries Required | No |
| Best Sellers Rank | #880,080 in Electronics ( See Top 100 in Electronics ) #261 in Network Interface Cards |
| Brand | NICGIGA |
| Compatible Devices | Desktop |
| Connector Type | ethernet |
| Customer Reviews | 4.5 4.5 out of 5 stars (570) |
| Data Link Protocol | Ethernet, Gigabit Ethernet |
| Data Transfer Rate | 2500 Megabits Per Second |
| Date First Available | 29 September 2021 |
| Does it contain liquid? | No |
| Hardware Interface | Ethernet, PCI |
| Item Dimensions LxWxH | 10 x 6 x 2 Centimeters |
| Item Weight | 90 g |
| Item model number | NIC-2.5G |
| Manufacturer | NICGIGA |
| Model | NIC-2.5G |
| Number of items | 1 |
| Operating System | 8 . 1,Linux,Windows |
| Product Dimensions | 10 x 6 x 2 cm; 90 g |
| Type of cable or wire | ethernet |

## Product Details

- **Brand:** NICGIGA
- **Colour:** Black
- **Compatible Devices:** Desktop
- **Data Link Protocol:** Ethernet, Gigabit Ethernet
- **Data Transfer Rate:** 2500 Megabits Per Second
- **Hardware Interface:** Ethernet, PCI
- **Item Weight:** 0.09 Kilograms
- **Manufacturer:** NICGIGA
- **Product Dimensions:** 10L x 6W x 2H Centimeters
- **UPC:** 756166630512

## Images

![2.5G Base-T PCIe Network Adapter, Realtek RTL8125B 2.5Gbps/1Gbps/100Mbps PCI Express Gigabit Network Card Convert to Ethernet RJ45 LAN Port for Gaming/Office, Support Windows/Linux,Black - Image 1](https://m.media-amazon.com/images/I/61tebFtcfnL.jpg)
![2.5G Base-T PCIe Network Adapter, Realtek RTL8125B 2.5Gbps/1Gbps/100Mbps PCI Express Gigabit Network Card Convert to Ethernet RJ45 LAN Port for Gaming/Office, Support Windows/Linux,Black - Image 2](https://m.media-amazon.com/images/I/71Cwh8PRnWL.jpg)
![2.5G Base-T PCIe Network Adapter, Realtek RTL8125B 2.5Gbps/1Gbps/100Mbps PCI Express Gigabit Network Card Convert to Ethernet RJ45 LAN Port for Gaming/Office, Support Windows/Linux,Black - Image 3](https://m.media-amazon.com/images/I/71gEGQhcGNL.jpg)
![2.5G Base-T PCIe Network Adapter, Realtek RTL8125B 2.5Gbps/1Gbps/100Mbps PCI Express Gigabit Network Card Convert to Ethernet RJ45 LAN Port for Gaming/Office, Support Windows/Linux,Black - Image 4](https://m.media-amazon.com/images/I/61l64Z6DKWL.jpg)
![2.5G Base-T PCIe Network Adapter, Realtek RTL8125B 2.5Gbps/1Gbps/100Mbps PCI Express Gigabit Network Card Convert to Ethernet RJ45 LAN Port for Gaming/Office, Support Windows/Linux,Black - Image 5](https://m.media-amazon.com/images/I/71cOGIAkjjL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by J***N on 14 September 2022*

Out of the box this was not running at the 2.5Gb speeds (even though Windows reported it as running 2.5Gb) it was staying around 900mb with iperf3 test between 2 other machines on network that both have 2.5Gb NICs. Using the QNAP 2.5Gbe unmanaged switch for 3 PCs that all have 2.5Gbe NICs. They are segmented on their own VLAN coming from pfsense firewall appliance which also has 2.5Gbe. After updating the drivers from the Realtek site as per the pamphlet that came in the box along with a small form factor screw driver and 2 screws (using case screw to match black aesthetic) and the 2 I/O plates, then it unlocked the full menu in the interface's controller properties. Also was getting closer to the 2.5Gb speeds on local network, RDP feels smoother and stable connections without drops. There is some irregularity in the iperf3 tests though. Not getting the irregularities from 3rd PC to main PC so not sure if it's driver related or just an issue with the Realtek chipset of this card. Overall though satisfied with the price to performance and hope there will be future driver updates, not counting on it though. For what I need it to do, be a stable RDP connection it seems to be holding strong and helps not feel laggy like it did with the default 1Gb port on the X370 Taichi Mobo. This is an improvement. If you do want a blacked out PCB and the bright green LED isn't visible while doing work then this is a good 2.5Gbe card. Also make sure you get the latest driver from Realtek, out of the box is not fully unlocked. Happy packets :)

### ⭐⭐⭐⭐⭐ Review
*by J***P on 1 March 2022*

In case you don't want to read the full review the short version is: Good card, worth the money, fully recommended. The problem: The first picture shows the problem: a 1Gbps connection that only reaches just over 300Mbps, with a wired connection. Having checked every piece of equipment between modem and motherboard, including running a CAT 7 cable directly between the two the problem was finally identified as a dodgy Intel chipset on the ASUS B550-F motherboard. In other words the onboard LAN was just unable to deliver the full broadband speed - and had been delivering substandard speeds for some time. The solution: pictures 2-4: a NICGIGA 2.5Gbps PCI-E card with a Realtek chipset. Why this card? Well, simply put, it has a black backplate that fits in with the motherboard's black backplates. I know, not the best reason but it also has a known chipset, a decent heatsink on the main chip, an handle over the 1Gbps bandwidth, future-proofs to a certain extent and is at good price point. (A quick note about the future-proofing: a 1 Gigabit connection can potentially deliver over 1Gbps - up to 1.3Gbps - whereas a 1Gbps card stops at 1Gbps. This card is 2.5Gbps and so will handle over 1Gbps and provides some future-proofing for when the next major speed increase comes in.) Install: was really simple: unscrew a backplate, install the card, screw in the card, close the case and plug in a CAT 7 cable bought at the same time - KINBETA high speed 10Gbps 2 metre CAT 7 flat braided cable - and switch on PC. See pictures 6-8. The result: picture 9 shows the result. As soon as the PC started the card was recognised, no driver download was needed. The download speed jumped from 321.5Mbps to 925Mbps (picture 9) solving the problem in a most elegant way. It is interesting to note that the ping was 9ms both before and after upgrading the NIC and upload also remained the same - the 52Mbps which was the expected speed and initially highlighted the problem. For those with a small form factor PC it is worth noting that a smaller backplate is provided (see picture 5) as well as a screwdriver and two screws. Overall very happy with this purchase it solved the problem at a reasonable cost and I can feel the difference the higher speed connection makes. Definitely recommend this card.

### ⭐⭐⭐⭐⭐ Review
*by C***N on 12 November 2025*

Instalar y utilizar. 0 problemas y tasa de transferencia sostenida.

## Frequently Bought Together

- NICGIGA 2.5G Base-T PCIe Network Adapter, Realtek RTL8125B 2.5Gbps/1Gbps/100Mbps PCI Express Gigabit Network Card Convert to Ethernet RJ45 LAN Port for Gaming/Office, Support Windows/Linux
- 5 Port 2.5GB Ethernet Switch Unmanaged Network Switch | 5 x 2.5 Gigabit | 1 x 10G SFP+ | Multigig Switch 10-100-1000Mbps | 45G Bandwidth | Plug & Play | Fanless Metal Internet Switch | NOT Support VPN
- UGREEN 2.5Gb USB to Ethernet Adapter - Aluminum, USB 3.0 to RJ45 Dongle for Laptop, Compatible with MacBook, XPS, Windows, macOS

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*Product available on Desertcart Ecuador*
*Store origin: EC*
*Last updated: 2026-03-15*