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Green PCB dual-port 2.5G Ethernet card with heatsink and PCIe x1 connector

SMUGDESK

SMUGDESK Dual 2.5G RJ45 PCIe x1 NIC Realtek RTL8125BG

SKU CH-ZQDA-79MH8

Adds two 2.5G RJ45 ports via PCIe x1 using a Realtek RTL8125BG controller for 2500Mbps wired throughput on existing Cat5e or Cat6 cable

  • Dual 2.5 Gbps ports deliver 2500 Mbps bandwidth over existing Cat5e or Cat6 cable
  • PCIe 2.1 x1 interface fits x1, x4, x8 or x16 slots for broad desktop compatibility
  • Hardware TCP/UDP checksum and large send offload reduce CPU load with 9 KB Jumbo Frame support
  • Passive heatsink enables stable 24/7 operation with per-port LINK/ACT LEDs for instant status
  • Official drivers for Windows 10, Windows 11, Linux and VMware ESXi ensure wide OS coverage

Dual 2.5G network card for desktop PCs

The SMUGDESK adapter adds two independent 2.5Gbps Ethernet ports through a single PCIe x1 slot. It targets builders who need multi-gigabit wired links for NAS access, soft-router projects or a replacement for a failed onboard port.

Capacity and headroom

Each RJ45 port auto-negotiates 2.5G, 1G, 100M or 10Mbps over existing Cat5e or Cat6 cable up to 100m. Hardware checksum offload, 9KB jumbo frames and VLAN tagging reduce CPU load, while EEE and Wake-on-LAN support always-on deployments.

Realtek RTL8125BG controller on PCIe 2.1 x1

The card uses the original Realtek RTL8125BG multi-gigabit controller connected via a PCIe 2.1 x1 interface that fits x1, x4, x8 or x16 slots. Official drivers cover Windows 10, 11, Server editions, major Linux distributions and VMware ESXi.

Highlights

  • Dual 2.5 Gbps ports deliver 2500 Mbps bandwidth over existing Cat5e or Cat6 cable
  • PCIe 2.1 x1 interface fits x1, x4, x8 or x16 slots for broad desktop compatibility
  • Hardware TCP/UDP checksum and large send offload reduce CPU load with 9 KB Jumbo Frame support
  • Passive heatsink enables stable 24/7 operation with per-port LINK/ACT LEDs for instant status
  • Official drivers for Windows 10, Windows 11, Linux and VMware ESXi ensure wide OS coverage

Specifications

No published specifications for this item yet.

Questions about this item

Will the PCIe 2.1 x1 interface limit performance on my older motherboard with only PCIe 2.0 slots?

The card is fully backward compatible with PCIe 2.0 x1 slots; each port still auto-negotiates 2.5G, 1G, 100M or 10M speeds so you get the full 2500Mbps link without a platform upgrade.

How can I verify both Realtek RTL8125BG ports are running at 2.5G after installation?

Each port has an individual LINK/ACT LED that lights solid when a 2.5G link is active; the driver also reports the negotiated speed in Device Manager or ethtool so you can confirm 2500Mbps operation.

Does the box include low-profile brackets and which cables do I need to buy?

The card ships with a standard-height bracket and passive heatsink installed; a low-profile bracket is not included. Use your existing Cat5e or Cat6 patch cables up to 100m for 2.5G connectivity.

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