NVIDIA Mellanox ConnectX-7 MCX755106AS-HEAT

What's the difference between this AS variant and the AC variant (product 482)? What is the factory default protocol mode?

The MCX755106AS-HEAT is the AS variant. Unlike the AC variant with a built-in crypto engine (product 482, MCX755106AC-HEAT), this SKU has no hardware IPsec/TLS encryption. This adapter ships with a factory default of Ethernet mode, though both QSFP112 ports can also natively run InfiniBand NDR, delivering up to 400Gb/s aggregate bandwidth via its PCIe 5.0 x16 host interface — all other features match the AC variant.

Does this adapter have a corresponding Lenovo OEM part number? Which server platforms can it deploy on?

Yes, in addition to the NVIDIA original ordering part number, this SKU is also validated and cross-referenced with a Lenovo OEM part number (03GX938 / 4XC7A81883), allowing direct deployment on Lenovo server platforms — convenient for customers using Lenovo systems who need procurement and compatibility confirmation, reducing cross-vendor validation costs.

Does this adapter support Socket Direct? What acceleration features are available when configured in InfiniBand mode?

This adapter is Socket Direct Ready, supporting an optional auxiliary card on compatible server platforms to split PCIe lanes across dual processor sockets, reducing cross-socket latency. When configured for native InfiniBand transport, it leverages SHARP in-network computing to accelerate collective operations, along with adaptive routing and advanced congestion control, well suited for HPC and AI fabric high-performance computing scenarios.

When configured in Ethernet mode, what RDMA and data transfer acceleration features does this adapter support?

When configured for Ethernet mode, this adapter supports RoCE v2 for low-latency RDMA over Ethernet fabrics, and also supports GPUDirect RDMA, enabling direct data transfer between GPU and network card while bypassing the host CPU. It also features hardware root-of-trust Secure Boot to protect adapter firmware integrity, suited for enterprise cloud and AI infrastructure requiring high-performance, low-latency deployments.

What is the form factor of this adapter, and which server deployment scenarios is it suited for?

This adapter does not use the OCP 3.0 form factor; instead it's a standard full-height PCIe card, maintaining broad compatibility with conventional server chassis. Combined with dual-port 200Gb/s VPI connectivity, Socket Direct Ready design, and the full ConnectX-7 RDMA stack, it's well suited for HPC, AI training, and enterprise cloud deployments on traditional rack server architectures that need high-bandwidth interconnects.

Host Interface	PCIe 5.0 x16 (Socket Direct-ready)
Port Count	2
Port Speed & Connector Type	Up to 200Gb/s per port, QSFP112 (up to 400Gb/s aggregate)
Network Protocol	VPI - InfiniBand NDR or 200GbE Ethernet (Ethernet default)
RDMA Support	Native InfiniBand RDMA; RoCE v2 in Ethernet mode
Socket Direct	Ready - supports optional auxiliary companion card for dual-socket platforms
Secure Boot	Supported
Crypto (Encryption Offload)	Not specified for this SKU - contact NVIDIA/MABLETECH for current crypto offload availability
Controller / ASIC	NVIDIA ConnectX-7
OEM Cross-Reference	Lenovo 03GX938 / 4XC7A81883
OS Support	Linux (RHEL/Ubuntu/SUSE), Windows Server, VMware ESXi, FreeBSD
Dimensions	Standard/low-profile PCIe card, exact dimensions vary by bracket - 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	900-9X7AH-0078-DTZ

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