What type of network ports are provided on the ConnectX-4 VPI MCX456A-FCAT?

This adapter is described as a dual-port QSFP28 network adapter. That means it exposes two QSFP28 ports, which can be used in environments that standardize on FDR InfiniBand 56Gb/s and 40 or 56GbE. The dual-port layout supports topologies requiring either redundant links or connections into separate fabrics.

Which InfiniBand speeds are supported by this network adapter?

The card is categorized for FDR InfiniBand 56Gb/s. This indicates that it is intended for use in InfiniBand fabrics operating at the FDR 56Gb/s speed class. When designing or expanding InfiniBand clusters, this adapter aligns specifically with FDR 56Gb/s infrastructure as reflected in its product category description.

Which Ethernet speeds are indicated for the NVIDIA ConnectX-4 VPI adapter card MCX456A-FCAT?

According to the category description, this network adapter is suitable for 40 or 56GbE Ethernet environments. Its dual-port QSFP28 interface allows integration into Ethernet networks that operate at these rates. Architects can rely on these specified speeds when matching the adapter to Ethernet switches and uplinks using QSFP28 ports.

Is the NVIDIA 900-9X4AC-0054-ST0 suitable for mixed InfiniBand and Ethernet deployments?

The adapter is part of the ConnectX-4 VPI family and is categorized for FDR InfiniBand 56Gb/s and 40 or 56GbE. This Virtual Protocol Interconnect orientation, along with QSFP28 ports aligned to these speed classes, makes it applicable for environments where both InfiniBand and Ethernet technologies are present at the specified speeds.

900-9X4AC-0054-ST0 - NVIDIA 900-9X4AC-0054-ST0 dual-port QSFP28 network adapter

Name: NVIDIA 900-9X4AC-0054-ST0 dual-port QSFP28 network adapter
Brand: NVIDIA
SKU: 900-9X4AC-0054-ST0
Price: 280 USD
Availability: InStock

900-9X4AC-0054-ST0 - NVIDIA 900-9X4AC-0054-ST0 dual-port QSFP28 network adapter | US IT Hardware

Product overview

The NVIDIA ConnectX-4 VPI adapter card MCX456A-FCAT, SKU 900-9X4AC-0054-ST0, is a dual-port QSFP28 PCIe 3.0 x16 network adapter designed for data center and enterprise networking environments that use FDR InfiniBand 56Gb/s and 40 or 56GbE. As part of the ConnectX-4 VPI family, it supports Virtual Protocol Interconnect operation aligned to these InfiniBand and Ethernet speeds. The dual-port QSFP28 configuration allows flexible connectivity planning in high-bandwidth fabrics that standardize on FDR InfiniBand and 40 or 56GbE. Its PCIe 3.0 x16 host interface makes it suitable for modern servers that can accommodate high-throughput adapters. This model targets deployments where both InfiniBand and Ethernet interoperability at 56Gb/s and selected 40 or 56GbE rates are required. With a focus on consistent performance in converged fabrics, it provides a technical foundation for scalable cluster and network designs based strictly on these supported link types and speeds.

Dual-port QSFP28 network connectivity
PCIe 3.0 x16 host interface for servers
Designed for FDR InfiniBand 56Gb/s fabrics
Supports 40 or 56GbE Ethernet environments
ConnectX-4 VPI MCX456A-FCAT adapter design
Suitable for converged InfiniBand or Ethernet use

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Featuring

Manufacturer part #	900-9X4AC-0054-ST0
Brand	NVIDIA
Condition	New
Model	MCX456A-FCAT
Series	ConnectX-4 VPI adapter card
Card Size	2.71 in x 5.6 in (68.90 mm x 142.24 mm)
Form Factor	Low profile adapter card
Part Number	900-9X4AC-0054-ST0
Bracket Type	Low profile bracket
Message Rate	Millions of messages per second
Product Line	ConnectX-4

Best for

FDR InfiniBand fabrics
Suitable for environments standardized on FDR InfiniBand 56Gb/s, using the dual QSFP28 ports to integrate servers into high-bandwidth InfiniBand fabrics.
40 or 56GbE networks
Supports 40 or 56GbE operation, making it applicable for Ethernet-based aggregation or core layers that use these link speeds over QSFP28.
Mixed InfiniBand or Ethernet clusters
As a ConnectX-4 VPI adapter aligned to FDR InfiniBand 56Gb/s and 40 or 56GbE, it fits clusters where both InfiniBand and Ethernet technologies are deployed.
PCIe 3.0 x16 server integration
Designed for servers with a PCIe 3.0 x16 slot, enabling straightforward installation of a dual-port QSFP28 adapter in compatible systems.

Frequently asked questions

What interface does the NVIDIA 900-9X4AC-0054-ST0 adapter use to connect to the host server?

The NVIDIA 900-9X4AC-0054-ST0, ConnectX-4 VPI adapter card MCX456A-FCAT, uses a PCIe 3.0 x16 host interface. It is categorized specifically as a PCIe 3.0 x16 dual-port QSFP28 network adapter. When planning deployment, you should ensure the target server has an available PCIe 3.0 x16 slot to accommodate this card.

Details

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InfiniBand Speed	FDR IB 56Gb/s

Supported Transport Types	Reliable Connection, Unreliable Connection, Unreliable Datagram, Raw Datagram, Raw Ethernet

Supported Operating Systems	Major Linux distributions, Microsoft Windows, VMware ESXi (via NVIDIA/Mellanox OFED and related driver stacks)

Supported Link Speeds Spectrum	1, 10, 25, 40, 50, 56 Gb/s

Supported InfiniBand Data Rates	FDR 56 Gb/s and lower legacy InfiniBand speeds

Performance

Latency Class	Low latency host-channel adapter
Lifecycle Status	Withdrawn / end of marketing (product family status)
Host Interface Throughput	x16 lanes PCIe Gen3 at 8.0 GT/s per lane
Aggregate Bidirectional Bandwidth	Up to 112 Gb/s InfiniBand or 80 Gb/s Ethernet (dual-port combined, line rate)

Power Supply Type	Powered from host system PCI Express slot
Typical Power Consumption	Approximately 9–12 W (typical operating power for dual-port ConnectX-4 VPI low-profile card)

Networking Ports & Interfaces

Port Type	QSFP28
Port Count	2 Ports
Bus Interface	PCIe 3.0 x16
Connector Type	Dual QSFP28 network ports
Ethernet Speed	40GbE; 56GbE
Host Interface	PCI Express 3.0 x16
LED Indicators	Per-port link and activity LEDs on QSFP28 cages
PCIe Slot Voltage	3.3 V and 12 V rails as provided by standard PCI Express slot
Port Configuration	2 network ports supporting either InfiniBand or Ethernet per port (VPI)
Network Interface Type	InfiniBand and Ethernet VPI
PCIe Slot Compatibility	Fits in PCIe 3.0 x16 mechanical slot, compatible with x16 and x8 electrical backplanes
Supported PCIe Standard	PCI Express 3.0 (Gen3), backward compatible with Gen2 and Gen1
Maximum Link Speed Per Port	FDR 56 Gb/s InfiniBand and 40 Gb/s Ethernet
Network Port Signaling Type	QSFP28 high-speed serial lanes supporting InfiniBand or Ethernet encoding
Host Interface Signaling Rate	8.0 GT/s per PCIe Gen3 lane
Management and Protocol Support	RDMA over Converged Ethernet (RoCE), InfiniBand verbs, and standard Ethernet protocols
Virtual Protocol Interconnect Support	Supports both InfiniBand and Ethernet (VPI)
Supported Ethernet Data Rates (Granular)	1 GbE, 10 GbE, and 40 GbE for this SKU

NVIDIA 900-9X4AC-0054-ST0 dual-port QSFP28 network adapter