Used Lenovo CX4121A 25GbE Dual Port SFP28 Card, low profile

Lenovo-branded Mellanox ConnectX-4 Lx dual-port 25 Gigabit Ethernet server adapter, card model CX4121A. Two SFP28 cages run at 25 Gbit/s and step down to 10 Gbit/s, so the card also works on existing 10G optics and direct-attach copper. Supplied with the low profile bracket fitted.

Fits any server, workstation or desktop with a free PCI Express x8 slot (also works in a physical x16 slot). Common uses are 10G uplinks between servers and switches, NAS and software-router builds, VMware ESXi hosts and NIC teaming.

• Controller: Mellanox ConnectX-4 Lx EN, model CX4121A (MCX4121A-ACAT)
• Lenovo FRU 01GR253, part number 01GR252, EC N34732U
• Ports: 2 x SFP28 cages
• Speed: 25 Gbit/s per port, also runs at 10 Gbit/s
• Bus: PCI Express 3.0 x8 (fits x8 and x16 slots)
• Drivers: Linux mlx5_core, VMware ESXi, Windows Server
• Bracket fitted: low profile (half height)

Condition: used, in working order. Sold as a bare card without optics or cables unless stated. Delivery time is about two weeks from order.

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