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

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.