NVIDIA Mellanox ConnectX-7 MCX75210AAS-NEAT

What does this card's "same-row 2x8" Socket Direct design mean, and how does it differ from designs requiring a second card?

This card uses a "same-row 2x8" PCIe 5.0 host interface design that implements NVIDIA's Socket Direct architecture within a single-slot form factor, splitting its x16 lanes into two adjacent x8 connectors to achieve balanced dual-CPU access without occupying a second physical card slot. Compared to traditional Socket Direct designs that require an optional auxiliary card and a second PCIe slot, this single-slot approach is better suited for server platforms with limited slot availability.

What are this card's port specifications, and how is InfiniBand vs. Ethernet protocol selected?

This card delivers up to 400Gb/s through a single OSFP connector and can run NDR InfiniBand or 400GbE Ethernet, with the protocol mode selectable in firmware, allowing system integrators to address both network architectures with a single card. This is a top-tier single-port 400Gb/s model in the ConnectX-7 family with dual-protocol VPI support.

What RDMA acceleration features does this card offer in InfiniBand mode versus Ethernet mode?

This card provides both hardware-based RoCE v2 for converged Ethernet RDMA and native InfiniBand transport. When operating in InfiniBand mode, it can leverage SHARP in-network computing to accelerate collective operations, along with advanced adaptive routing and congestion control tailored for InfiniBand fabrics, reducing communication bottlenecks in large-scale distributed workloads. When operating in Ethernet mode, it supports RoCE v2 for low-latency RDMA over converged Ethernet fabrics, along with SR-IOV and overlay network offload (VXLAN, NVGRE, GENEVE) for virtualization.

How is this card's firmware security ensured? What advantage does the PCIe 5.0 interface bring?

This card features Secure Boot to ensure firmware integrity and prevent unauthorized firmware tampering. Combined with a PCIe 5.0 host interface, it provides maximum bandwidth for modern CPU platforms, ensuring the single 400Gb/s port runs at line rate without being constrained by the host bus — particularly well suited for AI training and HPC clusters with the highest bandwidth requirements.

How does this card differ from the single-port 200Gb/s MCX75210AAS-HEAT (product 473)?

Both use an OSFP connector and support NVIDIA Socket Direct technology; the key difference is port speed. This model delivers up to 400Gb/s through its single port, suited to the most bandwidth-intensive AI training and HPC clusters, while the MCX75210AAS-HEAT provides single-port 200Gb/s. This model's Socket Direct also uses a "same-row 2x8" single-slot design, similar to the MCX75210AAS-HEAT's configuration; selection should be based on actual bandwidth needs and server slot configuration.

Host Interface	PCIe 5.0, 2x8 in a Row (Socket Direct, single-slot)
Port Count	1
Port Speed & Connector Type	400Gb/s NDR InfiniBand or 400GbE, OSFP
Protocol Mode	VPI — firmware-selectable InfiniBand or Ethernet
RDMA / Network Protocol	InfiniBand, RoCE v2
Secure Boot	Supported
Socket Direct	Supported — single-slot 2x8 dual-CPU balanced access
OS Support	Linux (RHEL/Ubuntu/SUSE), VMware ESXi (Socket Direct requires Linux/ESXi, typical for this architecture)
Management	NVIDIA MFT / NEO management tools (typical)
Operating Temperature	0°C to 55°C (typical)
Hardware Warranty	Per NVIDIA/OEM channel warranty terms
Regulatory Certifications	FCC, CE, RoHS (typical for NVIDIA ConnectX adapters)
Ordering SKU	See NVIDIA Price List

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