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Mellanox MCX542A-ACAN Network Adapter ConnectX-5 EN 25Gigabit

  • Up to 25Gb/s connectivity per port

  • Enhanced vSwitch/vRouter offloads

  • Enabler for efficient service chaining capabilities

  • Ideal for Web 2.0, Cloud, Storage, Telco platforms

ConnectX-5 EN 25Gigabit Ethernet Card - PCI Express 3.0 x16 - 2 Port(s) - Optical Fiber - 100GBase-X - Plug-in Card



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    Data analytics has become an essential function within many enterprise data centers, clouds and Hyperscale platforms. Machine learning relies on especially high throughput and low latency to train deep neural networks and to improve recognition and classification accuracy. The ConnectX-5 dual-port 25GbE is the perfect solution to provide machine learning applications with the levels of performance and scalability that they require.


    • Tag matching and rendezvous offloads

    • Adaptive routing on reliable transport

    • Burst buffer offloads for background checkpointing

    • NVMe over Fabric offloads

    • Backend switch elimination by host chaining

    • Embedded PCIe switch

    • Enhanced vSwitch/vRouter offloads

    • Flexible pipeline

    • RoCE for overlay networks

    • PCIe Gen 4.0 support

    • RoHS compliant

    • ODCC compatible

    • Various form factors are available


    • Up to 100Gb/s connectivity per port

    • Industry-leading throughput, low latency, low CPU utilization and high message rate

    • Innovative rack design for storage and Machine Learning based on Host Chaining technology

    • Smart interconnect for x86, Power, Arm, and GPU-based compute & storage platforms

    • Advanced storage capabilities including NVMe over Fabric offloads

    • Intelligent network adapter supporting flexible pipeline programmability

    • Cutting-edge performance in virtualized networks including Network Function Virtualization (NFV)

    • Enabler for efficient service chaining capabilities

    • Efficient I/O consolidation, lowering data center costs and complexity

    Extra Specifications for Mellanox MCX542A-ACAN Network Adapter ConnectX-5 EN 25Gigabit

    Main Specifications
    Device TypeNetwork adapter - 2 ports
    Form FactorPlug-in Card
    Interface (Bus) TypePCI Express 3.0 x16
    PCI Specification RevisionPCIe 1.1, PCIe 2.0, PCIe 3.0
    Ports25 Gigabit SFP28 x 2
    Data Link ProtocolGigabit Ethernet, 10 Gigabit Ethernet, 25 Gigabit Ethernet
    Data Transfer Rate25 Gbps
    Network / Transport ProtocolTCP/IP, UDP/IP, SMB, NFS
    Expansion / Connectivity
    Interfaces & Connections2 x 25Gb Ethernet - SFP28
    Software / System Requirements
    OS RequiredFreeBSD, Microsoft Windows, Red Hat Enterprise Linux, CentOS, VMware ESX
    FeaturesAuto-negotiation, MPLS support, Quality of Service (QoS), RDMA support, PXE support, Large Send Offload (LSO), Large Receive Offload (LRO), Receive Side Scaling (RSS), UEFI support, Advanced Error Reporting (AER), checksum offload support, Extended Message-Signaled Interrupts (MSI-X), iSCSI remote boot, Header Data Split (HDS), Transmit Side Scaling (TSS), RDMA over Converged Ethernet (RoCE), Priority-Based Flow Control (PFC), Network Controller Sideband Interface (NC-SI), Virtual Extensible LAN (VXLAN), Network Virtualization using Generic Routing Encapsulation (NVGRE), TLP Processing Hint (TPH), Extended Reliable Connected transport (XRC), Dynamically Connected transport (DCT), user mode registration and remapping of memory (UMR), On demand paging (ODP), Mellanox PeerDirect, Message Signaled Interrupts (MSI), OVS Offload, Data Plane Development Kit (DPDK), Jumbo Frames support (up to 9600 bytes), VLAN Tagging, Open Compute Project (OCP) 2.0 support, Accelerated Switching And Packet Processing (ASAP), MCTP over SMBus, Downstream Port Containment (DPC), Access Control Service (ACS), Process Address Space ID (PASID), Address Translation Services (ATS), Enhanced transmission selection (ETS), Quantized Congestion Notification (QCN), GENEVE support
    Compliant StandardsIEEE 802.1Q, IEEE 802.1p, IEEE 802.3ad (LACP), IEEE 802.3ae, IEEE 802.3ap, IEEE 802.3az, IEEE 802.3ba, IEEE 802.1AX, IEEE 802.1Qbb, IEEE 802.1Qaz, IEEE 802.1Qau, IEEE 802.1Qbg, IEEE 1588v2, IEEE 802.3bj, IEEE 802.3bm, OCP 2.0, IEEE 802.3by
    RoHS CompliantYes
    NamePart NumberQuantityDescription

    Warranty:1 year
    Phone No.:408-916.0055
    URL:Click here for Manufacturer Website
    Coverage:Replacement or repair
    Average Service Time:1-2 weeks

    If you need Technical Support for this item please contact:

    Type of Support:FULL
    Phone No.:408-916-0055
    URL:Click here for Manufacturer Website