---
product_id: 418047649
title: "I/O CREST 2.5 Gigabit Ethernet PCI Express PCI-E Network Controller Card 10/100/1000/25000 Mbps RJ45 LAN Adapter Converter for Desktop PC"
brand: "io crest"
price: "¥12923"
currency: JPY
in_stock: true
reviews_count: 5
category: "Io Crest"
url: https://www.desertcart.jp/products/418047649-i-o-crest-2-5-gigabit-ethernet-pci-express-pci
store_origin: JP
region: Japan
---

# 2.5 Gbps blazing speed Universal PCIe x1-x16 compatibility Includes low-profile bracket for compact builds I/O CREST 2.5 Gigabit Ethernet PCI Express PCI-E Network Controller Card 10/100/1000/25000 Mbps RJ45 LAN Adapter Converter for Desktop PC

**Brand:** io crest
**Price:** ¥12923
**Availability:** ✅ In Stock

## Summary

> 🚀 Upgrade your network, upgrade your workflow — don’t get left buffering!

## Quick Answers

- **What is this?** I/O CREST 2.5 Gigabit Ethernet PCI Express PCI-E Network Controller Card 10/100/1000/25000 Mbps RJ45 LAN Adapter Converter for Desktop PC by io crest
- **How much does it cost?** ¥12923 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/418047649-i-o-crest-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

- • **Compact & Customizable:** Switch between full-size and low-profile brackets to fit any PC chassis with ease.
- • **Future-Proof Networking:** Built on Realtek chipset with potential firmware upgrades hinting at 10Gbps speeds ahead.
- • **Plug & Play Versatility:** Seamlessly fits any PCIe slot from x1 to x16, perfect for desktops, workstations, and HTPCs.
- • **Blazing 2.5 Gigabit Speed:** Experience lightning-fast Ethernet connectivity that crushes standard gigabit limits.
- • **Cross-Platform Powerhouse:** Supports Windows, Mac, Linux, and legacy OS for ultimate compatibility.

## Overview

The I/O CREST 2.5 Gigabit Ethernet PCIe Network Card delivers ultra-fast 2.5Gbps wired connectivity via any PCI Express slot, supporting a wide range of operating systems and form factors. It includes both full and low-profile brackets for versatile installation, features LED indicators for link and speed status, and is backed by a 3-year warranty and lifetime support, making it the smart upgrade for professionals demanding speed and reliability.

## Description

Provides 2.5 Gigabit Ethernet connectivity to Mac Pro towers and Windows PCs. Simple way to add or expand 2.5 Gigabit Ethernet connectivity to any compatible computer. It is suitable for multiple market segments and emerging applications, such as desktop, mobile, workstation, server, communications platforms, and embedded applications.

Review: Upgrade to 2.5gig Ethernet PCIe Slot - This upgrade to 2.5gig Ethernet is easy to install into a PCIe slot and drivers are included on the supplied mini CD. Many drivers are included including Windows 11, 10, Mac and Linux. Full speed is 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 have these indicators or have holes to see through to an LED on the inside surface of the card. The Realtek chip and the software may be able to go to 10gig in the future since there is some references in drivers and other 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.
Review: Perfect card. - I bought this to test 2.5GbE on a PC that did not support it. This thing is plug-and-play, and worked everywhere I connected it. I bought it in 2021, and it's still working just as well as the day I got it!

## 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 x1, x2, 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 & 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.
- 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, 7-64 Bit, Linux, Mac OS 10.7
- What you get: IO crest 2.5 Gigabit PCI-E network card x1, driver Disk x1, 8cm low-profile bracket x1. Backed by IO crest 3 Year hassle-free warranty and lifetime customer service. Important Note: only work with PCI-E slot, not for PCI slot.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07RF4SZ8R |
| Box Contents | (1) 2.5Gb NIC Card, (1) Driver CD, (1) Low Profile Bracket, (1) Manual |
| Brand | IO Crest |
| Brand Name | IO Crest |
| Color | Black |
| Colour | Black |
| Compatible Devices | Desktop |
| Customer Reviews | 4.4 out of 5 stars 257 Reviews |
| Data Link Protocol | Ethernet |
| Data Transfer Rate | 2.5 Gigabits Per Second |
| Global Trade Identification Number | 00857426008260 |
| Hardware Interface | Ethernet, PCI, PCI Express x1 |
| Item Dimensions L x W x H | 10.9L x 1.3W x 14H Centimeters |
| Item Weight Unit of Measure | 0.2 Pounds |
| Manufacturer | I/O Crest |
| Manufacturer Part Number | SI-PEX24059 |
| Model Number | SI-PEX24059 |
| Product Dimensions | 10.9L x 1.3W x 14H Centimeters |
| UPC | 857426008260 |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** IO Crest
- **Colour:** Black
- **Compatible Devices:** Desktop
- **Data Link Protocol:** Ethernet
- **Data Transfer Rate:** 2.5 Gigabits Per Second
- **Global Trade Identification Number:** 00857426008260
- **Hardware Interface:** Ethernet, PCI, PCI Express x1
- **Item Weight:** 0.2 Pounds
- **Product Dimensions:** 10.9L x 1.3W x 14H Centimeters
- **UPC:** 857426008260

## Images

![I/O CREST 2.5 Gigabit Ethernet PCI Express PCI-E Network Controller Card 10/100/1000/25000 Mbps RJ45 LAN Adapter Converter for Desktop PC - Image 1](https://m.media-amazon.com/images/I/71lsMMrdhqL.jpg)
![I/O CREST 2.5 Gigabit Ethernet PCI Express PCI-E Network Controller Card 10/100/1000/25000 Mbps RJ45 LAN Adapter Converter for Desktop PC - Image 2](https://m.media-amazon.com/images/I/81RuIURre4L.jpg)
![I/O CREST 2.5 Gigabit Ethernet PCI Express PCI-E Network Controller Card 10/100/1000/25000 Mbps RJ45 LAN Adapter Converter for Desktop PC - Image 3](https://m.media-amazon.com/images/I/81SMykF7vRL.jpg)
![I/O CREST 2.5 Gigabit Ethernet PCI Express PCI-E Network Controller Card 10/100/1000/25000 Mbps RJ45 LAN Adapter Converter for Desktop PC - Image 4](https://m.media-amazon.com/images/I/8175qaKjh1L.jpg)
![I/O CREST 2.5 Gigabit Ethernet PCI Express PCI-E Network Controller Card 10/100/1000/25000 Mbps RJ45 LAN Adapter Converter for Desktop PC - Image 5](https://m.media-amazon.com/images/I/81NbWsReVUL.jpg)

## Customer Reviews

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

This upgrade to 2.5gig Ethernet is easy to install into a PCIe slot and drivers are included on the supplied mini CD. Many drivers are included including Windows 11, 10, Mac and Linux. Full speed is 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 have these indicators or have holes to see through to an LED on the inside surface of the card. The Realtek chip and the software may be able to go to 10gig in the future since there is some references in drivers and other 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.

### ⭐⭐⭐⭐⭐ Perfect card.
*by H***8 on 19 February 2026*

I bought this to test 2.5GbE on a PC that did not support it. This thing is plug-and-play, and worked everywhere I connected it. I bought it in 2021, and it's still working just as well as the day I got it!

### ⭐⭐⭐⭐⭐ De excelente tamaño
*by S***N on 5 February 2021*

Acabo de instalar la tarjeta de red, si costo trabajo para que mi tarjeta madre la reconociera, aunque al ser pci, y puedes conectarla en los puertos pci-e 16x, posiblemente mi tarjeta no la reconoce de este modo, y fue necesario colocarla en los pci. con eso la detecto windows sin problemas, ya solo busque el driver directo del fabricante del chipset, el cual es Realtek, y permitió que funcionara un poco mejor. A comparación de mis anteriores test con el conector de red de la tarjeta madre, si varia la velocidad de internet, pero puede que con el tiempo se ajuste y me de mejores resultados. la primera foto es del antes, y la segunda con la tarjeta

## Frequently Bought Together

- IO CREST 2.5 Gigabit Ethernet PCI Express PCI-E Network Interface Card 10/100/1000/25000 Mbps RJ45 LAN SI-PEX24059
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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-07-07*