NVIDIA Mellanox ConnectX-4 Lx

The KEXINT MCX4121A-ACAT is a high-performance 25GbE Dual-Port SFP28 Network Interface Card (NIC) engineered for modern AI data centers, cloud infrastructure, and high-density virtualized environments. Built on the original NVIDIA Mellanox ConnectX-4 Lx controller, this adapter provides up to 2.5 times the bandwidth of 10G networks while maintaining a similar power envelope, offering the most cost-effective ROI path for enterprises transitioning from 10G to 25G architectures.Its core advantage lies in comprehensive support for RoCE (RDMA over Converged Ethernet), delivering sub-microsecond latency and significantly enhancing the efficiency of NVMe-over-Fabrics (NVMe-oF) storage and high-performance computing (HPC) clusters. Furthermore, by integrating advanced hardware offload engines—including VXLAN, NVGRE, and Geneve—it effectively reduces CPU overhead, ensuring robust system performance even under heavy network traffic.Equipped with a standard 4.72 in (120mm) tall bracket, the card strictly adheres to US engineering and international installation standards, making it the preferred choice for IT architects and system integrators seeking superior I/O performance and long-term reliability.