---
product_id: 162706380
title: "Syba Dual 2.5 Gigabit Ethernet PCI-E Network Expansion Card RJ45 LAN Adapter Low Profile Bracket SD-PEX24066"
brand: "io crest"
price: "1811163₫"
currency: VND
in_stock: true
reviews_count: 10
category: "Io Crest"
url: https://www.desertcart.vn/products/162706380-syba-dual-2-5-gigabit-ethernet-pci-e-network-expansion
store_origin: VN
region: Vietnam
---

# Dual 2.5Gbps Ethernet ports Universal PCIe x1-x16 slot compatibility Low-profile bracket for compact builds Syba Dual 2.5 Gigabit Ethernet PCI-E Network Expansion Card RJ45 LAN Adapter Low Profile Bracket SD-PEX24066

**Brand:** io crest
**Price:** 1811163₫
**Availability:** ✅ In Stock

## Summary

> 🚀 Double Your Network Speed, Halve Your Downtime!

## Quick Answers

- **What is this?** Syba Dual 2.5 Gigabit Ethernet PCI-E Network Expansion Card RJ45 LAN Adapter Low Profile Bracket SD-PEX24066 by io crest
- **How much does it cost?** 1811163₫ with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/162706380-syba-dual-2-5-gigabit-ethernet-pci-e-network-expansion)

## 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 (10 through 7), Linux, and more, ensuring smooth integration into your existing tech ecosystem.
- • **Compact Powerhouse Design:** Includes an 8cm low-profile bracket, ideal for sleek HTPCs and small form factor setups without sacrificing performance.
- • **Future-Proof Your Network:** 802.1Q VLAN tagging and IEEE 802.3 standards compliance keep your infrastructure ready for evolving enterprise demands.
- • **Plug & Play PCIe Versatility:** Fits seamlessly into any PCI Express slot (x1 to x16), making upgrades effortless across desktops and workstations.
- • **Blazing Dual 2.5 Gigabit Speeds:** Experience lightning-fast network throughput with two independent 2.5Gbps Ethernet ports, perfect for multitasking pros.

## Overview

The Syba Dual 2.5 Gigabit Ethernet PCI-E Network Expansion Card (SD-PEX24066) delivers dual 2.5Gbps RJ45 LAN ports via any PCIe slot, including low-profile options for compact PCs. Compatible with a wide range of operating systems and supporting VLAN tagging, it’s engineered for professionals seeking reliable, high-speed wired connectivity in desktops, servers, and HTPCs. Backed by a 3-year warranty and lifetime support, it’s a future-ready upgrade for modern network demands.

## Description

Provides two 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: Gets HOT, but pulls data at 10GbE. Requires Thunderbolt, not just USB 4! - 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.
Review: Is revision 03, but be wary of Linux/BSD use - 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.

## 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 Dual 2. 5 Gigabit Ethernet network adapter card provides a simple connection to two 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 Dual 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, 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 Syba 3 year hassle-free and lifetime customer service. Important Note: only work with PCI-E slot, not for PCI slot.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07XJ8CMQX |
| Best Sellers Rank | #41 in Internal Computer Networking Cards |
| Customer Reviews | 3.9 3.9 out of 5 stars (1,091) |
| Date First Available | September 6, 2019 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 3.17 ounces |
| Item model number | SD-PEX24066 |
| Manufacturer | Syba |
| Product Dimensions | 4.2 x 0.5 x 5.5 inches; 3.17 ounces |
| Release date | September 6, 2019 |
| Type of item | Electronics |

## Product Details

- **Brand:** IO CREST
- **Hardware Interface:** PCI, PCI Express x1
- **Color:** multicolor
- **Compatible Devices:** Desktop
- **Product Dimensions:** 4.2"L x 0.5"W x 5.5"H
- **Data Link Protocol:** IEEE 802.3
- **Data Transfer Rate:** 25000 Megabits Per Second
- **UPC:** 810154018697
- **Global Trade Identification Number:** 00810154018697
- **Manufacturer:** Syba

## Images

![Syba Dual 2.5 Gigabit Ethernet PCI-E Network Expansion Card RJ45 LAN Adapter Low Profile Bracket SD-PEX24066 - Image 1](https://m.media-amazon.com/images/I/61JLeD-FNLL.jpg)

## Available Options

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

## Questions & Answers

**Q: Has anyone used this card with pfsense?**
A: I am using it now in a Pfsense server. Out of the box 5his card will not work with 2.4.5 p1. You will either need to manually integrate the new drivers in to the latest release or you can upgrade to 2.5 snapshot developmental release. 

Other option is to use Opnsense, which their latest stable build should support this card out of the box.

**Q: Why didn’t syba put heat sinks on the rtl8125 chips?  i’m seeing a lot of posts talking about throttling and erratic behavior from over heating.**
A: a few reviews dating as far back as Aug 2021 say this card was updated and now includes a heatsink.
but here it is 2023 and still the ad shows the [old] non-heatsink model card.
I don't think the Seller is very serious about marketing this product.

it appears from one review's photos that the heatsink doesn't cover the pair of RTL8125 ethernet chips
instead, it covers the ASM1182e chip, which is a 2-to-1 PCIe 2.0 "packet switch".
(assuming that's still on the board and wasn't updated to a better suited PCIe 3.0 switch).

https://m.media-amazon.com/images/I/71DvH7EMbgL.jpg
https://m.media-amazon.com/images/I/61hj6vAgZQL.jpg
https://m.media-amazon.com/images/I/814kvobDV-L.jpg
https://www.amazon.com/gp/customer-reviews/R2PUHQHMNBQ9HC
https://www.amazon.com/gp/customer-reviews/R24JDNHXCMCFAH

.

**Q: What pcie generation is it?**
A: PCIE 2.0 x1 lane
you can barely make out in one of the ad photos it has an ASM1182e chip.
the ASM1182e is a 2-to-1 PCIe 2.0 "packet switch".
the pair of RTL8125 ethernet chips connect through it, to one single PCIe lane.

since the pair of 2.5GbE running concurrently "could" transfer 5Gbps
but PCIe 2.0 lane speed is 5Gbps with 8b/10b encoding, 20% overhead
the max combined ethernet transfer is only 4Gbps.
or less.

you'll see a few Reviews here from people who caught on - that it can't produce 5Gbps.

**Q: Can the ports be aggregated in windows?  will it work with smb3?**
A: The ports for this card can't be aggregated.

## 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.

### ⭐ Linux/Fast/Stable
*by D***N on July 28, 2025*

Linux plug and play. Works great on 6x kernels. 600MB/s to and from my TruNAS machine running four Hitachi 10TB platter drives in zraid. Performance is steady and stable. EDIT Nov.25 Updated to 1 star. Less if I could. I've had two of these burn out this year and had to return them. Still recognized as present but fail to connect or get an IP. Real pain too because I have to remove my 4090 bracket to remove the card. Truly happy this works because it's the only x1 card I could find. Most of my board is blocked off by my RTX4090 and brace. Only other exposed slot is x8 but it has a card with 4x m.2 nvme drives on it. EDIT 8/16/2025 The card lasted less than three weeks and died. Does not recognize that a cable is even plugged in. I bought two and the second is working in place of the failed nic. We will see how long that lasts.

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*Product available on Desertcart Vietnam*
*Store origin: VN*
*Last updated: 2026-03-16*