Dell Mellanox ConnectX-4 Lx 25GbE 2-Port SFP28 PCIe Low-Profile Ethernet Adapter

A ConnectX-4 Lx controller on a low-profile card is the Dell Mellanox ConnectX-4 Lx 25GbE 2-Port SFP28 PCIe Low-Profile Ethernet Adapter, part number 406-BBLC. It has two SFP28 ports at 25GbE and fits servers whose slots take only half-height cards.

Use the full part number when you search or order, so there is no confusion with similar Dell network options.

ConnectX-4 Lx is an earlier generation of controller. It is mostly bought to replace failed adapters in servers configured with it, where matching the controller keeps drivers and firmware management unchanged. Two ports provide a redundant pair or separate networks.

SFP28 cages take SFP28 optics or direct attach cables, which are bought separately. The ports are rated at 25GbE, so confirm your switch speed before relying on a link.

Check the slot type in your chassis too, since a full-height bracket would be a different build.

The 406-BBLC is offered new and refurbished, each with a choice of 1 year or 3 years of warranty. No used offer is listed. Send your quantity and server model when you request pricing.