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Green PCB add-in card with two RJ-45 ports and silver bracket

BFKK

BFKK 2.5GBase-T Dual RJ-45 PCIe 2.1 x1 Network Card

SKU CH-1F8N-9RRTY

Dual-port 2.5GbE PCIe 2.1 x1 adapter with Realtek RTL8125BG and ASMedia ASM1806 controllers for network redundancy

  • Dual RJ-45 ports give redundant 2.5 GbE links
  • Realtek RTL8125BG plus ASMedia ASM1806 controllers drive both ports
  • PCIe 2.1 x1 fits almost any desktop slot
  • PXE boot VLAN tagging and Jumbo Frames boost efficiency
  • Broad OS support covers Windows Server Linux and VMware

Dual 2.5GBase-T RJ-45 Adapter

The BFKK card adds two 2.5GBase-T Ethernet ports through a PCI Express 2.1 x1 slot. It uses a Realtek RTL8125BG controller paired with an ASMedia ASM1806 bridge for dual-port operation. The board is designed for the PCIe 2.0 standard and fits any compatible x1 or larger slot. Hot-swap capability is not supported.

Suited for multi-link servers and workstations

This adapter fits administrators who need two 2.5 Gbit links for redundancy, link aggregation or separate network segments on Windows, Windows Server, Linux distributions or VMware. It lacks Wake-on-LAN, DPDK, iSCSI and FCoE support, so buyers who require those features should consider other options.

PCIe 2.1 x1 interface requirement

The card operates on a single PCIe 2.0 lane using the 2.1 revision of the specification. A system must provide a compatible PCI Express slot; without one the adapter cannot be installed.

How it compares

Measured against everything we stock in PCIe Expansion Cards, at today’s prices. Recalculated every night.

Price $78.99
Pricier than about 81% of the 891 comparable items (median $30.99).

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Specifications

No published specifications for this item yet.

Questions about this item

Will the Realtek RTL8125BG controller need a firmware update later?

The Realtek RTL8125BG controller runs the installed firmware; updates are released by Realtek and applied through the OS driver package when available.

Does the PCIe 2.1 x1 link cap the 2.5 GbE throughput under sustained load?

PCIe 2.1 x1 delivers roughly 4 Gb/s usable bandwidth, so the 2.5 GbE line rate fits with headroom for protocol overhead.

How warm does the ASMedia ASM1806 bridge get when both ports run all day?

The ASMedia ASM1806 bridge is passively cooled; under continuous dual-port traffic it reaches typical operating temperature for a PCIe 2.1 x1 add-in card.

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