LinksTek
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CX4121A Dual 25Gb/s SFP28 Fiber Ports Intelligent RDMA Ethernet Adapter for Virtualization and Storage Servers, Mellanox ConnectX-4 Lx EN MT27711A0 Ethernet Controller, 2X 25GbE PCIE 3.0 x8 NIC Card
CX4121A Dual 25Gb/s SFP28 Fiber Ports Intelligent RDMA Ethernet Adapter for Virtualization and Storage Servers, Mellanox ConnectX-4 Lx EN MT27711A0 Ethernet Controller, 2X 25GbE PCIE 3.0 x8 NIC Card
CX4121A Dual 25Gb/s SFP28 Fiber Ports Intelligent RDMA Ethernet Adapter for Virtualization and Storage Servers, Mellanox ConnectX-4 Lx EN MT27711A0 Ethernet Controller, 2X 25GbE PCIE 3.0 x8 NIC Card
CX4121A Dual 25Gb/s SFP28 Fiber Ports Intelligent RDMA Ethernet Adapter for Virtualization and Storage Servers, Mellanox ConnectX-4 Lx EN MT27711A0 Ethernet Controller, 2X 25GbE PCIE 3.0 x8 NIC Card
CX4121A Dual 25Gb/s SFP28 Fiber Ports Intelligent RDMA Ethernet Adapter for Virtualization and Storage Servers, Mellanox ConnectX-4 Lx EN MT27711A0 Ethernet Controller, 2X 25GbE PCIE 3.0 x8 NIC Card
CX4121A Dual 25Gb/s SFP28 Fiber Ports Intelligent RDMA Ethernet Adapter for Virtualization and Storage Servers, Mellanox ConnectX-4 Lx EN MT27711A0 Ethernet Controller, 2X 25GbE PCIE 3.0 x8 NIC Card
CX4121A Dual 25Gb/s SFP28 Fiber Ports Intelligent RDMA Ethernet Adapter for Virtualization and Storage Servers, Mellanox ConnectX-4 Lx EN MT27711A0 Ethernet Controller, 2X 25GbE PCIE 3.0 x8 NIC Card
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CX4121A Dual 25Gb/s SFP28 Fiber Ports Intelligent RDMA Ethernet Adapter for Virtualization and Storage Servers, Mellanox ConnectX-4 Lx EN MT27711A0 Ethernet Controller, 2X 25GbE PCIE 3.0 x8 NIC Card
CX4121A Dual 25Gb/s SFP28 Fiber Ports Intelligent RDMA Ethernet Adapter for Virtualization and Storage Servers, Mellanox ConnectX-4 Lx EN MT27711A0 Ethernet Controller, 2X 25GbE PCIE 3.0 x8 NIC Card
CX4121A Dual 25Gb/s SFP28 Fiber Ports Intelligent RDMA Ethernet Adapter for Virtualization and Storage Servers, Mellanox ConnectX-4 Lx EN MT27711A0 Ethernet Controller, 2X 25GbE PCIE 3.0 x8 NIC Card
CX4121A Dual 25Gb/s SFP28 Fiber Ports Intelligent RDMA Ethernet Adapter for Virtualization and Storage Servers, Mellanox ConnectX-4 Lx EN MT27711A0 Ethernet Controller, 2X 25GbE PCIE 3.0 x8 NIC Card
CX4121A Dual 25Gb/s SFP28 Fiber Ports Intelligent RDMA Ethernet Adapter for Virtualization and Storage Servers, Mellanox ConnectX-4 Lx EN MT27711A0 Ethernet Controller, 2X 25GbE PCIE 3.0 x8 NIC Card
CX4121A Dual 25Gb/s SFP28 Fiber Ports Intelligent RDMA Ethernet Adapter for Virtualization and Storage Servers, Mellanox ConnectX-4 Lx EN MT27711A0 Ethernet Controller, 2X 25GbE PCIE 3.0 x8 NIC Card
CX4121A Dual 25Gb/s SFP28 Fiber Ports Intelligent RDMA Ethernet Adapter for Virtualization and Storage Servers, Mellanox ConnectX-4 Lx EN MT27711A0 Ethernet Controller, 2X 25GbE PCIE 3.0 x8 NIC Card
CX4121A offers a cost-effective and flexible ethernet adapter solution for Web 2.0, cloud, data analytics, database, and storage platforms.
CX4121A Dual 25Gb/s SFP28 Fiber Ports Intelligent RDMA Ethernet Adapter for Virtualization and Storage Servers, Mellanox ConnectX-4 Lx EN MT27711A0 Ethernet Controller, 2X 25GbE PCIE 3.0 x8 NIC Card
Item #: 200033885

CX4121A Dual 25Gb/s SFP28 Fiber Ports Intelligent RDMA Ethernet Adapter for Virtualization and Storage Servers, Mellanox ConnectX-4 Lx EN MT27711A0

Item #: 200033885

GBP 83

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Price
GBP 83

Excluding Shipping, VAT & Custom charges ( Shipping, VAT and custom charges will be calculated on checkout.
If Item price + shipping is below GBP 135, 20% VAT will be calculated on checkout, if it is equal or above GBP 135, no VAT will be charged. )

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CX4121A offers a cost-effective and flexible ethernet adapter solution for Web 2.0, cloud, data analytics, database, and storage platforms.
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What Stands Out

High-Speed Connectivity
Equipped with dual 25GbE SFP28 fiber ports, this NIC card delivers exceptional bandwidth, ensuring fast data transfers for virtualization and storage servers, outperforming standard Ethernet solutions.
Intelligent RDMA Support
Incorporating advanced RDMA technology, this adapter significantly reduces CPU overhead. It enhances application performance, making it ideal for data-intensive environments in virtualization and storage.
Optimized Performance
Utilizing the Mellanox ConnectX-4 Lx EN MT27711A0, it provides robust optimization features, delivering reliable, high-quality performance in demanding server applications compared to competitors.

Product Details

Shop CX4121A Dual 25Gb/s SFP28 Fiber Ports Intelligent RDMA Ethernet Adapter for Virtualization and Storage Servers, Mellanox ConnectX-4 Lx EN MT27711A0 Ethernet Controller, 2X 25GbE PCIE 3.0 x8 NIC Card online at a best price in UK. B0FTXQF98M
  • 1. CX4121A is a dual 25GbE SFP28 fiber port intelligent RDMA Ethernet adapter with a PCIE Gen 3.0 x8 interface. Based on the Mellanox ConnectX-4 Lx EN MT27711A0 converged Ethernet controller, it provides a cost-effective and flexible Ethernet solution for Web 2.0, cloud, data analytics, database, and storage platforms.
  • 2. Ethernet Controller: Mellanox ConnectX-4 Lx EN MT27711A0；Bus Interface: PCIE 3.0 x8; Ethernet Speed: 2x 25GbE; Connector Type: 2x SFP28 Fiber Ports; Remote Boot: RoCE, PXE, iSCSI; Supports RDMA over RoCE; Support I/O Virtualization and SR-IOV; Support Overlay Networks by providing advanced NVGRE, VXLAN and GENEVE.
  • 3. Supports IEEE 802.3by, 25 Gb/s; IEEE 802.3ae 10Gb/s; IEEE 802.3az Energy Efficient Ethernet; IEEE 802.3ap; IEEE 802.3ad; 802.1AX; IEEE 802.1Q; 802.1P VLAN tags and priority; IEEE 802.1Qaz; IEEE 802.1Qbb; IEEE 802.1Qbg; IEEE 1588V2; Support Jumbo frame (9.6KB).
  • 4. PCIE Gen 3.0 Standard, 8Gb/s Per Lane. PCIE x8 Interface, 64Gb/s Bandwidth Totally, Ensure 2x SFP28 Fiber Ports archive 25GbE simultaneously. Auto-negotiates to PCIE X8, X4 Lane. Auto-switch to PCIE Gen 3.0, Gen 2.0. Support MSI/MSI-X mechanisms.
  • 5. Support plug and play on Windows 11, 10 64bit and Windows Server 2012, 2012R2, 2016, 2019, 2022, 2025 64bit. Compatible with RHEL, CentOS, FreeBSD, VMware and other Linux kernel-based systems.
  • 6. Support Open Fabrics Enterprise Distribution (OFED) and Open Fabrics Windows Distribution (WinOF-2). Will compatible with SFP28 transceivers, SFP28 DAC cables and SFP28 AOC cables with PAM4 ethernet links.
  • 7. ATTENTION: The LinksTek CX4121A serves as a drop-in alternative to the MCX4121A-ACAT for server applications.
Hardware InterfacePCI Express 3.0, PCI Express x8
Compatible DevicesDesktop
Data Link ProtocolEthernet
Data Transfer Rate25000 Megabytes Per Second
Compatible Operating System FamilyLinux, Windows
Minimum Required Operating System VersionWindows 10
Item Dimensions L x W x H4.72"L x 5.91"W x 0.71"H (12 x 15 x 1.8 cm)
Item Weight100 Grams
BrandLinksTek
ManufacturerLinksTek Co,Ltd
Mfr Part NumberCX4121A
Model NumberCX4121A
Unit Count1.0 Count
Product Dimensions (L x W x H)4.72"L x 5.91"W x 0.71"H (12 x 15 x 1.8 cm)
Number of Packs1

Who Should Buy?

Suitable For
  • Data Centers

    Ideal for data centers requiring high-speed networking for storage and virtualization applications with low latency.

  • Virtualization Environments

    Perfect for virtualization environments needing fast data transfer rates and efficient resource allocation among multiple VMs.

  • High-Performance Computing

    Well-suited for high-performance computing tasks that demand high bandwidth and low latency connections between servers.

Not Suitable For
  • Casual Users

    Not suitable for casual or home users who do not require high-speed networking or advanced features.

Product Description

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Customer Questions & Answers

  • Question: What operating systems are compatible with the CX4121A?

    Answer: The CX4121A is compatible with Windows 11, 10, Server 2012, 2016, 2019, 2022, as well as RHEL, CentOS, FreeBSD, and VMware.
  • Question: What is the maximum bandwidth of the CX4121A?

    Answer: The CX4121A provides a total bandwidth of 64Gb/s with its PCI Express Gen 3.0 standard X8 interface.
  • Question: Does the CX4121A support virtualization technologies?

    Answer: Yes, it supports I/O virtualization with SR-IOV technology for better resource management and isolation for virtual machines.

LinksTek Network Cards CX4121A Editorial Review

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Customer Reviews & Ratings

4.9
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“The product received very good packaging & safe…Thank You”

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“The process was smooth, with clear communication and timelines. This was my 1st purchase and I am really impressed. I will definitely be coming back.”

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GBP 83

Excluding VAT : VAT will be calculated on the checkout page

Order now and get it around Monday, July 27

QTY:

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Fastest cross-border delivery

Features & Benefits

  • Dual 25GbE SFP28 Fiber Ports for high-speed connectivity.
  • Supports RDMA over Converged Ethernet (RoCE) for low-latency performance.
  • Backed by the high-performance Mellanox ConnectX-4 Lx EN controller.
  • Seamless I/O virtualization with SR-IOV technology for improved server utilization.
  • Compatible with major operating systems including Windows, RHEL, and VMware.
  • Ensures maximum bandwidth with PCI Express Gen 3.0 interface.

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