MCX4121A-ACHT, NVIDIA Mellanox ConnectX-4 Lx Network Interface Card, 25GbE Dual-Port SFP28/PCIe3.0 x8/UEFI Enabled

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    Overview

    NVIDIA Mellanox MCX4121A-ACHT Overview

    The Mellanox MCX4121A-ACHT is a server-grade ConnectX-4 Lx EN network interface card designed for modern data centers and enterprise networks that need stable 10/25 GbE connectivity. Based on the Mellanox ConnectX-4 Lx EN controller, this PCIe add-in card delivers up to 50 GbE total Ethernet bandwidth through two SFP28 ports, making it suitable for high-throughput applications such as virtualization clusters, storage access, and east-west traffic inside racks. With a PCI Express 3.0 x8 host interface, the MCX4121A-ACHT integrates smoothly into standard x86 servers used across Asia, Europe, Africa, and North America, helping distributors and system integrators build consistent solutions across regions.

    Each SFP28 port supports 10/25 GbE, so you can start with 10 GbE links and later upgrade to 25 GbE without changing the card, which is useful for small and medium integrators planning phased deployments. The tall full-height bracket fits common 2U and 4U server chassis, reducing compatibility issues in mixed vendor environments. Host management support makes it easier for IT teams to monitor link status and manage firmware in large-scale rollouts, while UEFI boot support allows the NIC to be used for network boot and stateless server designs.

    For distributors, the MCX4121A-ACHT is a flexible accessory that can be bundled with servers, storage, and switches to build complete 25 GbE solutions. For integrators, the simple PCIe add-in card form factor speeds up installation and replacement, cutting on-site time and reducing configuration risks. End users benefit from reliable low-latency connectivity for private cloud, virtualization, and IP-based storage, without the need for complex configuration on the card itself. Whether you are refreshing legacy 10 GbE infrastructure or expanding to 25 GbE top-of-rack designs, the Mellanox MCX4121A-ACHT provides a stable and scalable network interface foundation that aligns with global data center practices.

    Product Highlights

    50 GbE
    Total Bw
    25 GbE
    Per Port
    PCIe x8
    Host If

    Product Applications Scenarios

    Data Center
    The NIC delivers up to 50 GbE bandwidth for rack servers, reducing bottlenecks in storage, VM traffic, and clustered workloads.
    Cloud Services
    10/25 GbE ports help cloud hosts scale east-west traffic efficiently, lowering per-node network cost while keeping latency low.
    Enterprise Network
    Provides reliable server uplinks for ERP, databases, and backup, improving throughput and reducing maintenance complexity.

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    Specification

    NVIDIA Mellanox MCX4121A-ACHT Specification

    Model
    MCX4121A-ACHT
    Brand
    Mellanox
    Product Type
    ConnectX-4 Lx EN network interface card
    Controller
    Mellanox ConnectX-4 Lx EN
    Host Interface
    PCI Express 3.0 x8
    Port Configuration
    2 x SFP28
    Ethernet Data Rate per Port
    10/25 GbE
    Total Ethernet Bandwidth
    Up to 50 GbE (2 x 25 GbE)
    Bracket Type
    Tall (full-height) bracket
    Management Features
    Host management support
    Boot Support
    UEFI enabled
    Form Factor
    PCIe add-in card

    Get more information

    Discover unbeatable prices and fast shipping for the MCX4121A-ACHT . Access the detailed MCX4121A-ACHT datasheet and ensure you're getting the best deal with our reliable delivery service. Need assistance? Our free live chat support is here to help. For more information about the product and pricing, contact us via live chat or email us at [email protected].

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    Q&A

    Questions & Answers

    What common troubleshooting steps can be taken for the MCX4121A-ACHT NIC?

    In case of network connectivity issues, first, verify cable connections and switch configurations. Check driver status and update if needed. Ensure proper NIC settings alignment with network requirements. If problems persist, contact technical support for further assistance.

    What accessories are available for the MCX4121A-ACHT network interface card?

    Accessories for the MCX4121A-ACHT may include additional SFP28 transceivers, cables, mounting brackets, and low-profile brackets for different installation scenarios. These accessories can enhance the flexibility and compatibility of the NIC in various network environments.

    How does the MCX4121A-ACHT compare to similar network interface cards in terms of performance?

    The MCX4121A-ACHT offers superior performance with its ConnectX-4 Lx EN technology, 25GbE dual-port SFP28 connectivity, and PCIe3.0 x8 support compared to other NICs in the same category. It delivers high-speed data transfers, low latency, and reliable network connectivity for demanding applications.

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