Mellanox Technologies MCX4121A-ACUT network card Internal Ethernet
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MCX4121A-ACUT
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overview
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MCX4121A-ACUT Overview
MELLANOX MCX4121A-ACUT Connectx-4 Lx En Network Interface Card 25gbe Dual-port Sfp28 Pcie3.0 X8 Uefi Enabled. Main Specifications Device Type Network Adapter Form Factor Plug-in Card Interface (bus) Type Pci Express 3.0 X8 Pci Specification Revision Pcie 1.1, Pcie 2.0, Pcie 3.0 Ports 25 Gigabit Sfp28 X 2 Dimensions (wxdxh) 5.6 In X 2.7 In Data Link Protocol 25 Gigabit Lan Data Transfer Rate 25 Gbps Network / Transport Protocol Tcp/ip, Udp/ip, Iscsi, Udapl Remote Management Protocol Rmon 2, Rmon Features Mpls Support, Pxe Support, Large Send Offload (lso), Large Receive Offload (lro), Receive Side Scaling (rss), Uefi Support, Single Root I/o Virtualization (sr-iov), Energy Efficient Ethernet, Checksum Offload Support, 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), Extended Reliable Connected Transport (xrc), Dynamically Connected Transport (dct), User Mode Registration And Remapping Of Memory (umr), On Demand Paging (odp), Network Partitioning (npar), Raid Offload, Iscsi Extensions Over Rdma (iser), Interrupt Coalescing, Peerdirect Rdma, 64/66 Encoding, Enhanced Transmission Selection (ets), Geneve Support Compliant Standards Ieee 802.1q, Ieee 802.1p, Ieee 802.3ad (lacp), Ieee 802.3ap, Ieee 802.3az, Ieee 802.1ax, Ieee 802.1qbb, Ieee 802.1qaz, Ieee 1149.1, Ieee 802.1qbg, Ieee 1588v2, Ieee 1149.6
ConnectX-4 Lx EN Network Interface Card 25GbE dual-port SFP28 PCIe3.0 x8 UEFI Enabled Tall Bracket
- Wired
- PCI Express Ethernet
- Internal
Summary Description
Mellanox Technologies MCX4121A-ACUT. Internal. Connectivity technology: Wired, Host interface: PCI Express, Interface: Ethernet. Product colour: Green, Silver
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Specifications
Overview
| Condition | Refurbished |
|---|---|
| Brand | Mellanox |
| Stock | In Stock |
Ports & interfaces
| Connectivity technology | Wired |
|---|---|
| Host interface | PCI Express |
| Interface | Ethernet |
| Fiber ports quantity | 2 |
| Fiber optic connector | SFP, SFP+, SFP28 |
Network
| Networking standards | IEEE 802.3cd, IEEE 802.3by, IEEE 1588v2, IEEE 802.1Q, IEEE 802.1Qaz, IEEE 802.1Qbb, IEEE 802.1Qbg, IEEE 802.3ad, IEEE 802.3ae, IEEE 802.3ap, IEEE 802.3az, IEEE 802.3ba |
|---|---|
| Ethernet LAN | Yes |
Design
| Product colour | Green, Silver |
|---|---|
| Internal | Yes |
Resources
Documents
Frequently Asked Questions
What are the primary performance specifications for the Mellanox ConnectX-4 Lx MCX4121A-ACUT? +
The MCX4121A-ACUT is a high-performance 25GbE network interface card featuring dual SFP28 ports. It utilizes a PCIe 3.0 x8 host interface, providing low-latency, high-bandwidth connectivity designed for modern data centers. This adapter is optimized to handle demanding workloads, ensuring efficient data transmission and improved throughput for enterprise-grade server environments requiring reliable 25GbE connectivity.
Does the MCX4121A-ACUT support RoCE for remote direct memory access? +
Yes, this adapter supports RoCE (RDMA over Converged Ethernet) versions v1 and v2. By offloading the transport layer to the hardware, the card reduces CPU overhead and minimizes latency, which is essential for storage clusters and high-performance computing applications where rapid data transfer between server memories is critical for overall performance.
Which operating systems are compatible with the Mellanox ConnectX-4 Lx NIC? +
The MCX4121A-ACUT maintains broad compatibility with major enterprise operating systems, including various Linux distributions, Windows Server editions, and major hypervisors like VMware ESXi. Utilizing standard Mellanox OFED drivers ensures seamless integration into existing infrastructure, allowing administrators to maintain consistent performance and stability across diverse hardware environments using standard networking protocols.
Is this Mellanox NIC suitable for virtualization and cloud deployment scenarios? +
Absolutely. This card is built with advanced hardware offload features specifically for virtualization, including SR-IOV (Single Root I/O Virtualization) support. These capabilities allow the NIC to present multiple virtual functions to virtual machines, effectively reducing the virtualization overhead on the host CPU and increasing network scalability for cloud-native applications and dense server environments.
What type of physical cabling and transceivers can I use with this SFP28 card? +
The MCX4121A-ACUT features two SFP28 ports, offering flexibility in physical layer connectivity. It supports 25GbE SFP28 optical transceivers for longer reach, as well as Direct Attach Copper (DAC) cables or Active Optical Cables (AOC) for short-reach, top-of-rack server-to-switch connectivity. Always ensure your chosen optics or cables comply with SFP28 standards to guarantee link stability and speed.
How does the MCX4121A-ACUT handle network congestion and traffic management? +
The card incorporates sophisticated hardware-based traffic shaping and congestion control mechanisms. By leveraging Mellanox’s advanced Ethernet offload engines, the NIC intelligently manages packet buffering and flow control, which helps prevent dropped packets during traffic spikes. This ensures deterministic performance for sensitive applications, maintaining a stable network environment even under heavy utilization.
Can I use the MCX4121A-ACUT in a 10GbE legacy infrastructure? +
Yes, the SFP28 port architecture is generally backward compatible with 10GbE SFP+ modules. This makes the MCX4121A-ACUT an excellent future-proofing choice, as you can deploy it in current 10GbE environments and perform a seamless upgrade to 25GbE networking later by simply swapping the transceiver or cable, without needing to replace the physical network interface card.
What is the recommended power and thermal profile for this PCIe card? +
The MCX4121A-ACUT is engineered for power efficiency, operating within standard PCIe power delivery limits. Due to its high performance, it requires adequate chassis airflow to ensure the components remain within operating temperature parameters. Proper rack cooling and ensuring the server's airflow baffles are correctly installed will maintain the card's longevity and prevent thermal throttling during continuous peak operation.
How can I request a bulk quote for multiple MCX4121A-ACUT units? +
For organizations planning large-scale infrastructure upgrades or volume deployments, BuyRouterSwitch.com makes the procurement process efficient. Simply add the desired quantity to your cart or contact our sales team directly through our website. We provide competitive pricing tailored to the specific needs of enterprise buyers, ensuring you receive the best value for your networking hardware investment.
Why should I choose BuyRouterSwitch.com for my enterprise networking hardware? +
BuyRouterSwitch.com is a trusted source for authentic enterprise-grade networking components. We specialize in sourcing hard-to-find hardware and maintain a streamlined, secure ordering process. When you purchase from us, you are gaining access to a professional supply chain partner committed to delivering high-quality equipment that meets your exact project specifications and deployment timelines, all backed by our industry-focused expertise.
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