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Green printed circuit board with silver metal bracket two SFP28 cages and gold PCIe edge connector

Lenovo

Lenovo ThinkSystem ConnectX-4 Lx ML2 25Gb 2-Port SFP28 network card

SKU CH-EXHJ-Q8XX9

Dual-port SFP28 adapter delivering 25 Gb Ethernet over PCIe 3.0 x8 for server networking

  • Rated speed20GBase-X
  • Interface typePCI-Express
  • Connection types20GBase-X
  • 25 Gb Ethernet speed for high-throughput workloads
  • Dual SFP28 ports enable flexible 25 Gb connectivity
  • PCI Express 3.0 x8 host interface delivers low-latency I/O
  • Plug-in card form factor fits standard server expansion slots
  • Designed for server deployment in cloud and data-analytics environments

ThinkSystem ConnectX-4 Lx ML2 25Gb 2-Port SFP28

This Lenovo network adapter delivers 25 Gb Ethernet connectivity through two SFP28 ports. It uses a PCI Express 3.0 x8 host interface in a plug-in card form factor designed for server deployment.

Upgrade from 10 Gb or 20GBase-X links

The card replaces older 10 Gb adapters when workloads need 25 Gb throughput per port. The jump is worth it for virtualised infrastructure, cloud platforms, data analytics and storage clusters that demand higher bandwidth and lower latency.

Fits PCIe 3.0 x8 slots with SFP28 transceivers

Installation requires an available PCI Express 3.0 x8 slot and compatible SFP28 modules or direct-attach cables. The dual-port design frees up a second expansion slot that a single-port card would otherwise occupy.

How it compares

Measured against everything we stock in Ethernet Cards & NICs, at today’s prices. Recalculated every night.

Price $333.99
Pricier than about 80% of the 1,505 comparable items (median $90.99).

Specifications

Product
Brand nameLenovo
Performance
Rated speed20GBase-X
Ports & slots
Interface typePCI-Express
Connection types20GBase-X

Questions about this item

What PCI Express slot does the ConnectX-4 Lx ML2 25Gb 2-Port SFP28 card need?

The adapter requires a PCI Express 3.0 x8 slot for full bandwidth, though it will negotiate down if installed in a wider or narrower lane.

How do I install the SFP28 transceivers into the two ports?

Remove the dust caps, align each transceiver key with the cage notch, push until the latch clicks, then secure the cables before powering on the server.

When should I replace the SFP28 modules or cables on this adapter?

Replace modules or cables if link lights fail, error counters rise, or you upgrade to 25 Gb speeds that exceed the current optics rating.

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