NVIDIA ConnectX-6 Dx PCIe 4.0 x16 100 Gigabit QSFP56 x 2 Network Adapter

The NVIDIA MCX623106AS-CDAT is a network adapter designed for servers that need to move data quickly without overloading the CPU. Built for a PCIe 4.0 x16 slot, it offers two QSFP56 ports that can each deliver up to 100 Gigabit Ethernet, giving a combined throughput of 200 Gbps when both links are active. This adapter comfortably fits into environments that already run 10, 25, 40, 50, or 100 GbE, so upgrading the network backbone can be done without a disruptive overhaul.

By supporting RDMA over Converged Ethernet version 2, the card lets applications move data from one host to another with almost no latency and minimal CPU intervention. That capability is valuable for distributed databases, high-performance computing clusters, and storage systems that rely on fast east-west traffic. Single Root I/O Virtualization is also available, allowing dozens of virtual machines to share the same physical adapter while still getting direct hardware access to network resources, which helps cloud platforms and enterprise virtualization stacks maintain consistent performance.

Security features such as Secure Boot and a baked-in hardware root of trust protect firmware integrity from power-on. For operators who need to run large overlay networks, the adapter can offload tunneling protocols like VXLAN, NVGRE, and GENEVE, freeing CPU cycles for application workloads. All of these functions come in a card that typically draws only 13 watts, a point that matters to data centers working within tight power budgets.

Whether you are expanding a rack dedicated to AI training, modernizing a virtual desktop infrastructure, or building a scale-out storage cluster, this adapter delivers the bandwidth, acceleration, and security features needed to keep traffic flowing smoothly.

Highlights:

• PCIe 4.0 x16 interface for high host-to-adapter bandwidth
• Two QSFP56 ports that each support 100 GbE, with an aggregate of 200 Gbps
• RDMA over Converged Ethernet version 2 for low-latency data transfers
• Single Root I/O Virtualization for efficient multi-tenant or VM deployments
• Tunnel offload for VXLAN, NVGRE, and GENEVE overlays
• Secure Boot and hardware root of trust safeguard adapter firmware
• Typical operational power draw of 13 watts helps control rack energy use