MCX4121A-XCAT Mellanox 10G SFP+ PCIe 3.0 x8 Ethernet Network Card

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Happyware Article Number:

SE0N1632-576936

Manufacturer Number:

MCX4121A-XCAT

Brand:

Mellanox

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Description Technical details Warranty & Technical Support Reviews Bulk Deals

MCX4121A-XCAT

High-Performance PCIe Ethernet Adapter for 10GbE Connectivity with the MCX4121A-XCAT

The MCX4121A-XCAT is a full-height PCIe 3.0 x8 NIC delivering dual 10GbE SFP+ connectivity for server uplinks, virtualization hosts, and storage transport, using hardware offloads to reduce CPU overhead while maintaining predictable latency. MCX4121A-XCAT supports 1/10GbE profiles, RoCE for RDMA-capable east-west traffic, and iSCSI/iSER enablement for Ethernet-based storage architectures.

Why Choose the MCX4121A-XCAT?

MCX4121A-XCAT provides efficient 10GbE port density with enterprise-grade offloads and virtualization features that scale cleanly across clustered compute nodes. MCX4121A-XCAT integrates into standard PCIe server platforms with stable driver and firmware behavior.

Mellanox engineering prioritizes deterministic networking, robust telemetry and manageability paths, and compatibility with modern data centre switching and overlay standards to support long lifecycle deployments.

Key Applications:

VMware and KVM virtualization
VXLAN/NVGRE/Geneve overlays
RoCE-enabled cluster interconnects
iSCSI/iSER storage networking

At Happyware - Server Hardware you benefit from non-binding offers tailored to your deployment and an extended warranty up to 6 years to protect MCX4121A-XCAT investments in production environments.

Technical details of MCX4121A-XCAT

Boot Technology: PXE-Bootrom

DPU Support: None

Fabric Type: Ethernet

Form Factor: Full-Height

Networking Type: Ethernet

OS: None

Offload Protocols: Energy Efficient Ethernet, Flow control, GENEVE, iSCSI, iSER, Jumbo Frames support, LACP, MSI-X, NC-SI, NVGRE, PXE support, QoS, RoCE, SR-IOV, TCP/IP offloading, VLAN support, VXLAN

PCIe Connector: PCIe 3.0 x8

Ports: 2x SFP+ 10 Gbps

Precision Time Protocol (PTP): None

RDMA: RDMA, RoCE

Storage Offload: iSCSI

Supported Server Vendors: Universal

Supported Speed Profile: 1G, 10G

Virtualization: SR-IOV, NVGRE, VXLAN Offload, Geneve Offload, VLAN support, Jumbo Frames support, PXE support, iSCSI, LACP, NC-SI, QoS, MSI-X

How long is the Warranty and how you can get technical support for MCX4121A-XCAT

Warranty:	12 months (part)
Advanced replacement:	yes
RMA Url:	https://network.nvidia.com/support/limited-warranty-and-rma-terms/
Description:	Advanced replacements may be available at Mellanox's discretion, but the Customer must return the defective unit within 30 days or be charged. RMA-Number Required, Delivery times can vary but are generally within 30 days of receiving the defective product. On-site service is not standard.