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Green PCB network card with four RJ-45 ports and PCIe x4 gold fingers

BFKK

BFKK 2.5G 4 Port NIC Quad RJ-45 PCIe 2.1 x4 Network Adapter Card

SKU CH-86VC-57CZ4

Four-port 2.5G Ethernet adapter with Realtek RTL8125BG and ASMedia ASM1812 controllers on a PCIe 2.1 x4 interface

  • Four RJ-45 ports at 2.5 Gbps each for high-density connectivity
  • Realtek RTL8125BG and ASMedia ASM1812 controllers ensure robust data-intensive performance
  • PCIe 2.1 x4 lane interface provides efficient bandwidth for demanding tasks
  • Jumbo Frames, Wake on LAN and DPDK support accelerate packet processing and storage links
  • Broad OS compatibility across Windows, Windows Server, Linux, CentOS, Ubuntu and VMware environments

Quad-port 2.5G network adapter

The BFKK card adds four RJ-45 ports through a PCIe 2.1 x4 slot using a Realtek RTL8125BG and ASMedia ASM1812 controller combination. It targets servers or workstations that need dense 2.5 GbE connectivity without moving to 10 GbE hardware. Compatibility spans Windows 7 through 11, Windows Server 2008 R2 to 2019, Linux kernels 2.6.x to 5.x, CentOS 6 through 8, Ubuntu 16 through 20 and VMware environments.

Installation notes

The card fits a standard PCIe 2.1 x4 slot and does not support hot-swap insertion, so the system must be powered down before fitting. Driver availability across the listed operating systems is broad, but PXE boot and VLAN tagging are not supported, which can surprise administrators expecting those features. Jumbo Frames, Wake on LAN, DPDK, iSCSI and FCoE are supported for advanced workloads.

Capacity and limits

Four 2.5 GbE ports provide aggregated throughput suitable for multi-tenant file serving, virtualisation clusters or high-density backup networks. The PCIe 2.1 x4 host interface caps total bandwidth near the theoretical maximum of the slot, so sustained line-rate traffic on all four ports simultaneously will saturate the bus. Buyers needing 10 GbE speeds or PXE/VLAN functions should look elsewhere.

Highlights

  • Four RJ-45 ports at 2.5 Gbps each for high-density connectivity
  • Realtek RTL8125BG and ASMedia ASM1812 controllers ensure robust data-intensive performance
  • PCIe 2.1 x4 lane interface provides efficient bandwidth for demanding tasks
  • Jumbo Frames, Wake on LAN and DPDK support accelerate packet processing and storage links
  • Broad OS compatibility across Windows, Windows Server, Linux, CentOS, Ubuntu and VMware environments

Specifications

No published specifications for this item yet.

Questions about this item

How can I confirm the card is operating at 2.5G speed after installation?

Check the link speed in your operating system's network adapter settings or run a throughput test between two connected devices; the Realtek RTL8125BG controller should report a 2.5 Gbps link on each of the four RJ-45 ports.

What is included in the box and do I need to buy any cables or brackets separately?

The card itself with four RJ-45 ports and a PCIe 2.1 x4 interface is supplied; standard Ethernet patch cables and a low-profile bracket if required are not included and must be purchased separately.

Which version should I choose for a Linux system running kernel 5.x?

The single hardware version listed supports Linux kernels from 2.6.x to 5.x, so it will work with your kernel 5.x installation without needing a different variant.

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