Mellanox ConnectX-4 Lx MCX4121A-XCAS Dual-Port 10GbE SFP28 PCIe 3.0 x8 Adapter – Used

Description

Mellanox ConnectX-4 Lx MCX4121A-XCAS Dual-Port 10GbE Adapter

The Mellanox MCX4121A-XCAS is a ConnectX-4 Lx EN adapter with two SFP28 cages running at 10GbE. It uses a PCIe 3.0 x8 interface and supports RoCE, SR-IOV and overlay network offloads, making it a low-power 10GbE card for virtualized servers.

Condition: used, in good working condition. Light cosmetic wear is possible. You get the part shown in the photos; cables, drivers and other accessories are not included unless listed.

Specifications

Brand	Mellanox
Model	MCX4121A-XCAS
Controller	Mellanox ConnectX-4 Lx EN
Ports	2x SFP28 cages, 10GbE
Host interface	PCIe 3.0 x8
Features	RoCE, SR-IOV, VXLAN/NVGRE offloads
Condition	Used

Compatibility

• Servers and workstations with a free PCIe slot of the stated width or wider
• Works with Windows Server, Linux and VMware ESXi using the vendor drivers
• Optics or DAC cables are sold separately; use transceivers that match the port type

Shipping

• Ships from our US warehouses
• Orders placed by 3 PM Eastern ship the same business day
• Free ground shipping (3–5 business days) to all US addresses
• FedEx 2Day Air available at checkout

Frequently asked questions

Does it include transceivers or cables?
No. Optics and DAC cables are sold separately. Ask us if you need matching transceivers.

Which bracket does it have?
It ships with the bracket shown in the photos. Contact us before ordering if you need a different height.

What is your shipping cutoff?
Orders placed by 3 PM Eastern (Monday–Friday) ship the same business day. Need a later cutoff? Contact us at sales@techontime.net or 303-222-8038, and we’ll do our best on a case-by-case basis.

Not sure it fits your system?
Send us your server or system model and the label of your current part at sales@techontime.net or call 303-222-8038, and we’ll confirm before you order.