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Green PCB PCIe x1 card with silver RJ45 port and metal bracket

YINGHUA

YINGHUA RTL8125 2.5G PCIe x1 RJ45 Ethernet Adapter

SKU CH-AA58-FX5K3

Adds a 2.5G RJ45 Ethernet port via PCIe x1 for 10/100/1000/2500 Mbps wired networking

  • TypeNetwork Interface Card
  • Adds 2.5 Gbps wired Ethernet via PCIe x1 slot
  • Single RJ45 port supports 10/100/1000/2500 Mbps speeds
  • IEEE 802.3 compliant for reliable network performance
  • Works with Microsoft Windows and Linux operating systems
  • Includes PXE boot support for network-based deployment

Wired Ethernet upgrade for PCIe slots

This YINGHUA RTL8125 network card adds a single RJ45 port to any system with a free PCI Express x1 lane. It targets desktops, workstations or servers that lack a 2.5 Gbps port or need a replacement for a failed onboard controller. The adapter is new and supports both Microsoft Windows and Linux operating systems out of the box.

Practical limits of the 2.5GBASE-T interface

The card negotiates at 10, 100, 1000 or 2500 Mbps over standard twisted-pair cabling and complies with IEEE 802.3/u/ab specifications. Throughput is bounded by the single PCIe lane and the RJ45 connector, so sustained speeds cannot exceed the negotiated link rate. Full-duplex and half-duplex modes are both available, and link activity LEDs provide immediate visual status.

Replaces slower onboard or add-in NICs

Install this adapter when the existing network interface is limited to 1 Gbps or has stopped working, and the infrastructure already runs Cat5e or better cabling capable of 2.5 Gbps. The jump is worthwhile only if the switch or router also supports 2.5GBASE-T; otherwise the connection will fall back to 1 Gbps and the extra headroom goes unused. PXE boot support allows diskless deployments without additional hardware.

Highlights

  • Adds 2.5 Gbps wired Ethernet via PCIe x1 slot
  • Single RJ45 port supports 10/100/1000/2500 Mbps speeds
  • IEEE 802.3 compliant for reliable network performance
  • Works with Microsoft Windows and Linux operating systems
  • Includes PXE boot support for network-based deployment

Specifications

TypeNetwork Interface Card

Questions about this item

Should I choose the 2.5G version or a 1G model for my setup?

This adapter supports 10, 100, 1000 and 2500 Mbps speeds on a single RJ45 port, so it covers both 1G and 2.5G links without needing a separate card.

What does the 2500 Mbps rating actually deliver inside my PC?

The RTL8125 controller runs on a PCIe x1 slot and negotiates up to 2.5 Gbps with a compatible switch or router, giving real-world throughput close to that ceiling.

Does the PCIe x1 interface limit the 2.5G speed in practice?

A PCIe x1 lane provides ample bandwidth for 2.5 Gbps Ethernet, so the bus does not cap the advertised data rate of 2500 Mbps.

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