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NVIDIA Mellanox ConnectX-6 MCX623435AC-CDAB OCP 3.0

ConnectX-6 Dx EN single-port 100GbE OCP 3.0 adapter with Secure Boot & Crypto offload

P/N: MCX623435AC-CDAB

Host Interface

PCIe 4.0 x16

Port Count

1-port

Port Speed & Connector Type

100Gb/s, QSFP56 connector

RDMA / Network Protocol

RoCE v2 (RDMA over Converged Ethernet)

Secure Boot

Supported — authenticated firmware boot chain

Regulatory Certifications

Product Description

Key Features

PCIe 4.0 x16 host interface delivering up to 100Gb/s of Ethernet throughput
Single 100GbE port over QSFP56 connector for high-speed uplink connectivity
RDMA over Converged Ethernet (RoCE v2) for low-latency, low-CPU-overhead data transfer
Hardware Crypto engine for inline IPsec/TLS encryption and decryption without host CPU penalty
Secure Boot authenticates firmware at every boot to prevent unauthorized code execution
ASAP² hardware offload accelerates Open vSwitch (OVS) and virtual switching/routing
Overlay network offload for VXLAN, GENEVE, NVGRE and MPLS encapsulation
SR-IOV support for network function virtualization and secure multi-tenant isolation
OCP 3.0 Small Form Factor with tool-less, hot-swappable bracket for hyperscale racks

Technical Specifications

Host Interface	PCIe 4.0 x16
Port Count	1-port
Port Speed & Connector Type	100Gb/s, QSFP56 connector
RDMA / Network Protocol	RoCE v2 (RDMA over Converged Ethernet)
Secure Boot	Supported — authenticated firmware boot chain
Crypto	Supported — inline IPsec/TLS hardware encryption offload
Form Factor	OCP 3.0 Small Form Factor (SFF), tall/short bracket
Controller/ASIC	ConnectX-6 Dx ASIC, MT28928 series (typical for this OCP 3.0 family)
OS Support	Linux (RHEL/Ubuntu/SUSE), Windows Server, VMware ESXi, FreeBSD
Management	NVIDIA MFT, UEFI/PXE remote boot, NC-SI (typical for ConnectX-6 Dx OCP adapters)
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	900-9X658-0046-SB0

Platform Compatibility

Platform	Status

Q&A

What makes the MCX623435AC-CDAB different from other ConnectX-6 Dx OCP cards?

Its defining feature is the onboard Crypto engine, which performs inline IPsec/TLS encryption and decryption in hardware — most other SKUs in this family lack this capability.

Does hardware encryption slow down network throughput?

No. The Crypto engine offloads encryption/decryption from the host CPU, so the adapter can sustain its full 100Gb/s line rate while securing data in motion.

Is Secure Boot supported alongside Crypto on this card?

Yes, this SKU combines Secure Boot firmware authentication with hardware Crypto offload, making it a strong fit for security-sensitive deployments.

Does this adapter support Multi-Host or Socket Direct?

No, this SKU is a single-host adapter without Multi-Host or Socket Direct support; those features are available on other ConnectX-6 Dx OCP 3.0 SKUs.

What port speed and connector does this card provide?

It provides one 100Gb/s Ethernet port over a QSFP56 connector, using a PCIe 4.0 x16 host interface.

Connectivity

No connectivity available.

Documents & Downloads

No documents available for this product.

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