---
product_id: 434747999
title: "IO CREST Quad 2.5 Gigabit Ethernet PCI Express PCI-E Network Interface Card 10/100/1000/25000 Mbps RJ45 LAN Realtek RTL8125 Chipset, Black (SI-PEX24077)"
brand: "io crest"
price: "R2242"
currency: ZAR
in_stock: true
reviews_count: 5
url: https://www.desertcart.co.za/products/434747999-io-crest-quad-2-5-gigabit-ethernet-pci-express-pci
store_origin: ZA
region: South Africa
---

# 2.5 Gbps ultra-fast Ethernet speed Universal PCIe x4/x8/x16 compatibility Includes low-profile bracket for compact builds IO CREST Quad 2.5 Gigabit Ethernet PCI Express PCI-E Network Interface Card 10/100/1000/25000 Mbps RJ45 LAN Realtek RTL8125 Chipset, Black (SI-PEX24077)

**Brand:** io crest
**Price:** R2242
**Availability:** ✅ In Stock

## Summary

> 🚀 Upgrade your LAN game with 2.5G speed—because your network deserves to keep up!

## Quick Answers

- **What is this?** IO CREST Quad 2.5 Gigabit Ethernet PCI Express PCI-E Network Interface Card 10/100/1000/25000 Mbps RJ45 LAN Realtek RTL8125 Chipset, Black (SI-PEX24077) by io crest
- **How much does it cost?** R2242 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/434747999-io-crest-quad-2-5-gigabit-ethernet-pci-express-pci)

## Best For

- io crest enthusiasts

## Why This Product

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

## Key Features

- • **Broad OS Compatibility:** Supports Windows, Linux, and macOS—future-proof your network with universal driver support.
- • **Blazing 2.5 Gigabit Speed:** Experience lightning-fast network transfers up to 2500 Mbps—because buffering is so last decade.
- • **Plug & Play PCIe Versatility:** Fits any PCI Express x4, x8, or x16 slot for seamless integration into your workstation or gaming rig.
- • **Enterprise-Grade VLAN Support:** Fully compatible with 802.1Q VLAN tagging to keep your network segmented and secure like a pro.
- • **Compact & Flexible Installation:** Comes with an 8cm low-profile bracket, perfect for sleek HTPCs and small form factor setups.

## Overview

The IO CREST Quad 2.5 Gigabit Ethernet PCIe Network Card delivers ultra-fast 2.5 Gbps wired connectivity via a PCI Express slot, compatible with x4, x8, and x16 interfaces. It includes a low-profile bracket for compact PC cases and supports a wide range of operating systems including Windows, Linux, and macOS. Featuring Realtek RTL8125 chipset and VLAN tagging compliance, it’s designed for professionals seeking reliable, high-speed network performance backed by a 3-year warranty.

## Description

IO CREST Quad 2.5 Gigabit Ethernet PCI Express PCI-E Network Interface Card 10/100/1000/25000 Mbps RJ45 LAN Realtek RTL8125 Chipset, Black (SI-PEX24077)

## Features

- With this PCIe Card, you can add a 10/100/1000/25000 Mbps Ethernet port to any PC through a PCIe slot.Fits any PCI Express x4, x8 or x16 socket; Additional 8cm Low-profile bracket provides the option for installation in small size HTPC case.
- This PCI-based 10/100/1000/25000 2.5 Gigabit Ethernet Network Adapter Card provides a simple connection to a 2.5 Gigabit Ethernet network, and is fully compatible with 802.1Q Virtual LAN (VLAN) Tag. and Ethernet card which is compliant to IEEE802.3, IEEE802.3u and IEEE802.3ab.
- The high quality PCIe 2.5 Gigabit NIC with 12cm profile bracket and Additional 8cm Profile Bracket that makes it easy to install the card in a small form factor/low profile computer case/server.
- 2.5 Gigabit network card Compatible with a broad range of operating systems, including Windows 10, 8/8.1, 98SE, ME, 2000, XP, XP-64bit, Vista, Vista-64bit, 7, 7-64bit, Linux, macOS 10.7
- What You Get: IO Crest Quad 2.5 Gigabit PCI-E Network Card x1, Driver Disk x1, 8cm Low-profile Bracket x1. Backed by Syba 3 Year Hassle-free Warranty and Lifetime Customer Service. Important Note: Only work with PCI-E slot, Not for PCI Slot.

## Product Details

- **Brand:** IO CREST
- **Hardware Interface:** PCI Express x4
- **Color:** Black
- **Compatible Devices:** Desktop
- **Product Dimensions:** 1.5"L x 7"W x 5.5"H
- **Data Link Protocol:** Ethernet, Gigabit Ethernet, IEEE 802.3
- **Data Transfer Rate:** 2.5 Gigabits Per Second
- **Item Weight:** 0.19 Kilograms
- **UPC:** 857426008901
- **Manufacturer:** Syba

## Images

![IO CREST Quad 2.5 Gigabit Ethernet PCI Express PCI-E Network Interface Card 10/100/1000/25000 Mbps RJ45 LAN Realtek RTL8125 Chipset, Black (SI-PEX24077) - Image 1](https://m.media-amazon.com/images/I/513GMU2-nkL.jpg)

## Available Options

This product comes in different **Size, Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Gets HOT, but pulls data at 10GbE. Requires Thunderbolt, not just USB 4!
*by T***Y on June 22, 2025*

Have not used it for extended periods of time, but seems to work correctly when combined with a USB4 or Thunderbolt4 port. It does get HOT, so don't put anything on top of it. Windows 11 driver worked just fine out of the box, but I did tweak some settings. I do this on all my Ethernet adapters.If your USB4 port is not also Thunderbolt, this device will not show up as a network adapter. It uses the Aquantia chip. It will show up as a USB device with no function.

### ⭐⭐⭐⭐⭐ Is revision 03, but be wary of Linux/BSD use
*by E***Y on February 25, 2023*

Edit: as of XigmaNAS 13.1.0.5.9725 this adapter is now recognized and works as-expected! Thanks to ms49434 and zoon01 for applying a kernel patch to accept the PHY that is present. Original review follows.The adapter arrived in a small, cardboard box. The heatsink is attached securely. A hardware check indicates that the chip is revision 03.Under Windows 10/11, the adapter is usable with no additional effort or configuration on the user's side.Under Linux/FreeBSD, the adapter may or may not work depending on the version of the driver used to attempt init. Under FreeBSD specifically, support for the I225 was added in 13.1 via 𝚒𝚐𝚌, however the driver performs an unnecessary PHY vendor ID check, which may fail if the adapter reports an ID that isn't listed in an internal table.The fix (recommended by Intel themselves) is to no longer perform this check and instead assume a PHY for all I225 adapters. This fix is available in FreeBSD 13.2 and/or 14, and would need to be backported if using anything earlier.Examples; TrueNAS Scale 22.12.0 supports this adapter, while XigmaNAS 13.1.0.5.9687 (latest as of this review) includes 𝚒𝚐𝚌, but fails to init with the adapter I received.

### ⭐⭐⭐⭐⭐ Upgrade to 2.5gig Ethernet PCIe Slot
*by R***R on January 12, 2024*

This upgrade to 2.5gig Ethernet is easy to install into a PCIe slot and drivers are included on thesupplied mini CD. Many drivers are included including Windows 11, 10, Mac and Linux. Full speedis achieved using Cat 6 wire. Both full form and small form factor hardware included - easy to change out.Ethernet socket has two LED indicators for link and speed which is good since other cards may not havethese indicators or have holes to see through to an LED on the inside surface of the card. The Realtek chipand the software may be able to go to 10gig in the future since there is some references in drivers andother information of the system. Maybe a firmware update in the future for this?Overall, this is a great product and very reasonable in price and support.

## Frequently Bought Together

- IO CREST Quad 2.5 Gigabit Ethernet PCI Express PCI-E Network Interface Card 10/100/1000/25000 Mbps RJ45 LAN Realtek RTL8125 Chipset, Black (SI-PEX24077)
- TP-Link 8 Port Gigabit Switch | Easy Smart Managed | Plug & Play | Desktop/Wall-Mount | Sturdy Metal w/ Shielded Ports | Support QoS, Vlan, IGMP and LAG (TL-SG108E)

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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-02-24*