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Green PCIe network card with silver RJ45 port and low-profile bracket

Vszerda

Vszerda 2.5G PCIe Network Adapter RTL8125B Low Profile

SKU CH-7FTY-DK4FV

Adds 2.5 Gbps Ethernet over a PCIe x1 slot with a low-profile bracket included

  • 5 Gbps throughput on CAT5e cable
  • PCIe 2.1 x1 lane fits X1, X4, X8, X16 slots
  • Low-profile bracket included for slim chassis builds
  • PXE boot and Wake-on-LAN supported
  • Broad OS support from Windows 98 SE to Linux and macOS

2.5G PCIe Network Adapter

The Vszerda RTL8125B adds a single 2.5GBase-T RJ45 port to any desktop or server through a PCI Express 2.1 x1 lane. It auto-negotiates 10, 100, 1000 and 2500 Mbps speeds over Cat5e or better cabling and includes a low-profile bracket for compact chassis.

Home labs and small offices needing 2.5G uplinks

The card supports Windows from ME through Server 2016, Linux, macOS, DOS and several hypervisors including ESXi 6.7 and Unraid 6.9.2. It does not support ESXi 7.0, so administrators targeting that hypervisor should select a different adapter.

One lane handles 2.5G line rate

A single PCIe 2.1 lane provides enough bandwidth for full-duplex 2.5G traffic with headroom for protocol overhead. The port is limited to 2.5G maximum, so environments requiring 5G or 10G connectivity will need a higher-speed controller.

Highlights

  • 5 Gbps throughput on CAT5e cable
  • PCIe 2.1 x1 lane fits X1, X4, X8, X16 slots
  • Low-profile bracket included for slim chassis builds
  • PXE boot and Wake-on-LAN supported
  • Broad OS support from Windows 98 SE to Linux and macOS

Specifications

No published specifications for this item yet.

Questions about this item

What type of PCIe slot is required for the Vszerda RTL8125B adapter to operate?

The adapter uses a PCI Express 1x slot and is compatible with X1, X4, X8, and X16 slots, supporting the PCI Express 2.1 standard for 2.5 Gbps bus speed.

Will this 2.5G network card negotiate a link with my existing Cat5e cabling and 1 Gbps switch?

Yes, it supports 10/100/1000 Mbps and 2.5 Gbps speeds, complies with IEEE 802.3bz for 2.5G over Cat5e UTP, and includes Auto MDIX for automatic crossover detection.

How do the LED indicators show that the 2.5 Gbps link is active after installation?

The card features a single LED indicator that displays 100M, 1G, or 2.5G Link/Act status, allowing you to verify the negotiated speed and activity visually.

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