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Green PCB network card with silver RJ45 port and metal bracket

YINGHUA

YINGHUA 2.5G PCIe Network Card RTL8125B 10/100/2500Mbps RJ45

SKU CH-X4K5-2RXXJ

Adds a 2.5 Gbps RJ45 port over PCIe 2.1 with Realtek RTL8125B and low-profile bracket included

  • 5 Gbps throughput via RTL8125B chip for faster wired networking
  • Fits PCIe x1 through x16 slots for broad motherboard compatibility
  • Includes standard and low-profile brackets for flexible case installation
  • Supports Windows 10, 8, 8.1, 7 and Linux operating systems
  • Auto-negotiation with extended next-page capability ensures stable link establishment

2.5G PCIe Ethernet adapter

This network card adds a single 2.5Gbps RJ45 port through any PCI Express x1, x2, x4, x8 or x16 slot. It uses the Realtek RTL8125B controller and supports 10, 100, 1000 and 2500Mbps link speeds. The card works with Windows 10, 8, 8.1, 7 and Linux, though driver installation is required. It is suited for desktops that need faster wired throughput than standard gigabit.

Build and bracket flexibility

A standard-height bracket and a low-profile bracket are both included with screws, so the card fits full-size and slim chassis alike. The PCB occupies a single slot and draws power only from the PCIe connector; no auxiliary power cable is needed. The RJ45 jack features auto-negotiation with extended next-page capability and supports pair-swap and polarity correction for tolerant cabling.

PCIe 2.1 x1 bandwidth ceiling

The adapter connects through a PCI Express 2.1 x1 interface, which limits maximum throughput to the lane's 5Gbps raw bandwidth. Real-world 2.5Gbps traffic fits within this envelope, but the card cannot exceed the bus limit. It also requires a PCIe slot and will not function in legacy PCI slots. Buyers needing 5Gbps or 10Gbps Ethernet should select a different controller.

Highlights

  • 5 Gbps throughput via RTL8125B chip for faster wired networking
  • Fits PCIe x1 through x16 slots for broad motherboard compatibility
  • Includes standard and low-profile brackets for flexible case installation
  • Supports Windows 10, 8, 8.1, 7 and Linux operating systems
  • Auto-negotiation with extended next-page capability ensures stable link establishment

Specifications

No published specifications for this item yet.

Questions about this item

Does the PCIe 2.1 interface cap the 2.5 Gbps speed in practice?

PCIe 2.1 x1 provides about 4 Gbps usable bandwidth, so the 2.5 Gbps line rate is not limited by the bus.

Which bracket fits a low-profile chassis?

The package includes a low-profile bracket alongside the standard bracket and screws for either form factor.

What is the first step after inserting the card into a PCIe x1 slot?

Install the Realtek driver from the included CD or the Realtek website before the adapter will pass traffic.

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