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MCX4121A-ACUT

The Mellanox MCX4121A-ACUT enterprise network card can stably provide up to

25GbE dual-port data throughput without affecting server computing performance.

This secure, high-performance network card is optimized for demanding

enterprise-level high-concurrency network business applications.


Enterprise Network Cards Suitable for High IO Workloads

The MCX4121A-ACUT network card provides dual-port SFP28 connectivity, enabling

high-speed network interconnection for data center infrastructures that require

highly reliable enterprise network cards. It provides cost-effective and reliable access

to virtualization, cloud computing, and storage networks, enabling data center

rchitects and IT professionals to deliver reliable performance, rock-solid stability,

advanced hardware offload capabilities, and an extremely low total cost of

ownership for demanding 24/7 operations.

Powerful High-Speed Data Transmission, Suitable for 24/7 Operating Environments

The MCX4121A-ACUT network card is powered by the ConnectX-4 Lx EN controller

and supports RoCE v1 / RoCE v2 hardware RDMA acceleration, far exceeding

standard gigabit network cards. With advanced 128MB DDR4 on-board memory,

UEFI Secure Boot support, and multi-host architecture design, it ensures stable and

consistent low-latency transmission performance in large-scale clusters and SDN

software-defined network systems.

High Performance Suitable for Mainstream Data Center Applications

With a PCIe 3.0 x8 high-speed interface and SR-IOV (supporting up to 256 VFs)

virtualization technology, the MCX4121A-ACUT can be efficiently and easily

integrated into massive enterprise computing systems. Through user-definable

innovative technologies like VXLAN/NVGRE tunnel offload and GPUDirect technology,

it can flexibly adapt to storage and computing business needs, further reducing the

total cost of ownership.

Enhanced Reliability, Data Protection, and Security

Advanced security features provide reliable protection for business data at the

network level. The MCX4121A-ACUT prevents unauthorized access and features

end-to-end QoS and secure firmware update mechanisms, making it suitable for

24/7 uninterrupted operation in servers and storage arrays, fully ensuring

enterprise business data security and network integrity.

Item Specification
Part Number MCX4121A‑ACUT
Chipset ConnectX‑4 Lx EN
Ports 2 × SFP28
Data Rate per port 1 GbE / 10 GbE / 25 GbE
Host Interface PCIe 3.0 x8 (backward compatible with PCIe 2.0 / 1.1)
On‑board Memory 128 MB DDR4
Form Factor Half‑height, half‑length; Full‑height bracket shipped, low‑profile bracket included
Special Feature UEFI Secure Boot enabled (secure firmware boot support)
RDMA RoCE v1 / RoCE v2 (hardware‑accelerated)
Virtualization SR‑IOV, up to 256 VF (Virtual Functions)
Hardware Offloads VXLAN, NVGRE, Geneve tunnel offload; iSCSI, iSER, NVMe‑oF; TCP/UDP checksum, LSO/LRO
Typical Power Consumption ~12 W (excluding optical modules)
Operating Temperature 0 °C ~ 55 °C
Storage Temperature ‑40 °C ~ 70 °C
Supported OS Linux, Windows Server, VMware ESXi, FreeBSD, DPDK, OFED
Key Features GPUDirect, Multi‑Host, UEFI PXE boot, end‑to‑end QoS, secure firmware update

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