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Item #:
200033885
Dual 25Gb/s SFP28 Fiber Port Intelligent RDMA Ethernet Adapter for Virtualization and Storage Servers, Mellanox ConnectX-4 Lx EN MT27711A0 Ethernet
Item #:
200033885
MWK 276475
Price Details
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Imported from USA store
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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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Note: Step Down Voltage Transformer required for using electronics products of US store (110-120). Recommended power converters Buy Now.
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
Who Should Buy?
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Data Centers
Ideal for data centers requiring high-speed networking for storage and virtualization applications with low latency.
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Virtualization Environments
Perfect for virtualization environments needing fast data transfer rates and efficient resource allocation among multiple VMs.
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High-Performance Computing
Well-suited for high-performance computing tasks that demand high bandwidth and low latency connections between servers.
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Casual Users
Not suitable for casual or home users who do not require high-speed networking or advanced features.
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Budget-Conscious Buyers
May not be ideal for users with tight budgets as it is a high-end networking solution with a premium price.
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Legacy Systems
Incompatible with older systems lacking support for PCIe 3.0 or 25GbE networking capacity.
Product Description
Dual 25Gb/s SFP28 Fiber Port 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)
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Customer Questions & Answers
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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.
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“The product received very good packaging & safe…Thank You”
16 June 2026 · via Trustpilot
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“Accurate delivery timing given”
16 June 2026 · via Trustpilot
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“Not madly expensive like I thought, and much quicker than promised.”
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6/7/2026 · via Trustpilot
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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.”
12 June 2026 · via Trustpilot
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MWK 276475
Order now and get it around Tuesday, July 14
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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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