NVIDIA Mellanox ConnectX-7 MCX75310AAS-NEAT

How does this card differ from the AC variant with an embedded crypto engine (MCX75310AAC-NEAT)? Which controller chip does it use?

Both are single-port 400Gb/s OSFP adapters that ship with InfiniBand NDR as the factory default mode; the key difference is the embedded hardware crypto engine. The AC variant includes hardware crypto offload, while this AS variant omits that engine, making it a cost-optimized choice for deployments where encryption is handled at another layer of the infrastructure. This card uses the CX07-INT-B1LP-A0 (A7) ConnectX-7 controller chip.

What are this card's port speed and dual-protocol VPI support?

This card provides a single 400Gb/s OSFP port, delivering NVIDIA ConnectX-7's highest port speed within a standard PCIe form factor. The port ships with InfiniBand NDR 400Gb/s as the factory default mode and can also be configured for 400GbE Ethernet, allowing system integrators to flexibly deploy the same card in either InfiniBand or Ethernet architectures without procuring separate models for each protocol.

What RDMA capabilities does this card provide in InfiniBand mode versus Ethernet mode?

This card provides ConnectX-7's full RDMA stack: when operating in InfiniBand mode, it uses native InfiniBand transport with SHARP in-network computing acceleration, offloading collective operations to the network switch fabric to accelerate AI/HPC workloads; when operating in Ethernet mode, it supports RoCE v2 for low-latency RDMA over 400GbE Ethernet fabrics, providing high-performance remote data access regardless of which protocol the card is running.

Does this card support GPUDirect RDMA? How is firmware integrity protected?

Yes. GPUDirect RDMA enables direct data transfer between GPU memory and the NIC, bypassing the host CPU and system memory, which benefits AI/ML and HPC workloads. This card also features hardware-enforced Secure Boot to protect firmware integrity and prevent tampering, ensuring stable and secure operation when deployed across large-scale GPU clusters.

What are this card's host interface and form factor specifications?

This card installs via a PCIe 5.0 x16 host interface, providing ample bandwidth headroom to sustain the single 400Gb/s port at line rate, combined with adaptive routing and advanced congestion control to maintain high throughput and low tail latency in large multi-path network architectures. It uses a standard low-profile PCIe form factor with broad server chassis compatibility, suited for a wide range of data center deployments requiring the highest available single-port bandwidth.

Form Factor	Standard-height, stand-up PCIe card
Host Interface	PCIe 5.0 x16
Port Count	1
Port Speed & Connector Type	400Gb/s, OSFP
Network Protocol	VPI - InfiniBand NDR (default speed) or 400GbE Ethernet
RDMA Support	Native InfiniBand RDMA; RoCE v2 in Ethernet mode
Secure Boot	Supported
Crypto (Encryption Offload)	Not supported on this SKU (see MCX75310AAC-NEAT for the crypto-enabled variant)
Controller / ASIC	NVIDIA ConnectX-7 (CX07-INT-B1LP-A0 / A7)
OS Support	Linux (RHEL/Ubuntu/SUSE), Windows Server, VMware ESXi, FreeBSD
Dimensions	Standard/low-profile or OCP 3.0 SFF card, exact dimensions vary by SKU - see datasheet
Operating Temperature	0C to 55C typical
Hardware Warranty	Per NVIDIA/OEM channel warranty terms
Regulatory Certifications	FCC, CE, RoHS (typical for NVIDIA ConnectX adapters)
Management	NVIDIA MFT firmware tools; UEFI HII
Ordering SKU	900-9X766-003N-SQ0

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