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Green circuit board with silver heatsink and two gold RJ45 ports

SMUGDESK

SMUGDESK Dual Port 2.5G PCIe x1 NIC Realtek RTL8125BG

SKU CH-KASA-TR7PA

Adds two 2.5G Ethernet ports via a single PCIe x1 slot with Realtek RTL8125BG controller, passive heatsink, and dual brackets for desktop or NAS

  • Dual 2.5GbE ports add high-speed wired links for NAS or desktop
  • PCIe 2.1 x1 interface fits x1 x4 x8 x16 slots with full dual-port bandwidth
  • Realtek RTL8125BG controller auto-negotiates 2500 1000 100 10 Mbps over Cat5e Cat6 up to 100m
  • Passive aluminum heatsink plus per-port LEDs ensure stable long-run operation and instant status check
  • Hardware offloads checksums LSO jumbo frames VLAN flow control plus WoL PXE cut CPU load and enable remote boot

Dual-port 2.5G PCIe x1 NIC

This network card adds two independent 2.5G Ethernet ports to a desktop PC or NAS through a single PCIe x1 slot. It suits home media servers, soft routers and small-business networks that need link aggregation or separate network segments without occupying multiple expansion slots.

Installation notes

The board fits standard full-height and low-profile brackets supplied in the box, so it works in regular towers and slim small-form-factor cases alike. Each RJ45 port has its own link and activity LED for instant status checks, and the passive aluminium heatsink keeps the RTL8125BG controller cool during continuous operation.

Key specification

The Realtek RTL8125BG controller drives both ports at 2.5Gbps concurrently over Cat5e or Cat6 cable up to 100 metres, with hardware checksum offload, 9KB jumbo frames, VLAN tagging and IEEE 802.3x flow control to minimise CPU load.

Highlights

  • Dual 2.5GbE ports add high-speed wired links for NAS or desktop
  • PCIe 2.1 x1 interface fits x1 x4 x8 x16 slots with full dual-port bandwidth
  • Realtek RTL8125BG controller auto-negotiates 2500 1000 100 10 Mbps over Cat5e Cat6 up to 100m
  • Passive aluminum heatsink plus per-port LEDs ensure stable long-run operation and instant status check
  • Hardware offloads checksums LSO jumbo frames VLAN flow control plus WoL PXE cut CPU load and enable remote boot

Specifications

No published specifications for this item yet.

Questions about this item

How can I verify the card is running at 2500Mbps after installation?

Check the LINK/ACT LED on each RJ45 port; a solid or blinking light confirms an active 2.5G link, and the OS network adapter status will show 2500Mbps speed when connected with Cat5e or Cat6 cable up to 100m.

What brackets and cables are included, and what must I supply?

The box contains the dual-port card, a full-height bracket and a low-profile half-height bracket for slim chassis; you must provide Cat5e or Cat6 Ethernet cables and an available PCIe x1, x4, x8 or x16 slot.

Which version should I choose for a Windows 11 desktop versus a Linux NAS?

The single model works for both; it has native kernel driver support in Ubuntu, CentOS and Debian, and Windows 7/10/11 drivers are available, so no separate version is needed for either OS.

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