How many network ports are available on this adapter and what type are they?

This adapter offers a dual-port configuration, providing two Ethernet ports for connectivity. Both ports use QSFP28 interfaces, which are suitable for 40GbE and 56GbE links. The dual-port design allows either higher aggregate bandwidth from a single card or separation of traffic across two independent high-speed ports.

Which host interface does the 900-9X426-0054-SQ0 adapter use?

The 900-9X426-0054-SQ0 adapter uses a PCIe 3.0 x8 host interface. This means it is designed to be installed in a PCIe Gen 3.0 x8 slot in the server, aligning with common expansion slot configurations and providing a standard path for integrating dual-port 40/56GbE connectivity.

Is the NVIDIA ConnectX-4 EN MCX414A-BCAT suitable for standard rack servers?

Yes, the NVIDIA ConnectX-4 EN MCX414A-BCAT is supplied with a tall full-height bracket. This bracket type is designed for standard rack-mount server chassis, making it suitable for typical data center deployments that require dual-port QSFP28 40/56GbE connectivity in full-height slots.

What distinguishes the MCX414A-BCAT model within the ConnectX-4 EN family?

The MCX414A-BCAT model combines the ConnectX-4 EN Ethernet controller with dual QSFP28 ports, 40/56GbE support, and a PCIe 3.0 x8 interface. It is identified by SKU 900-9X426-0054-SQ0 and includes a tall bracket, distinguishing it from other ConnectX-4 EN variants that may use different port counts, brackets, or interfaces.

900-9X426-0054-SQ0 - NVIDIA 900-9X426-0054-SQ0 40/56GbE dual QSFP28 NIC

Name: NVIDIA 900-9X426-0054-SQ0 40/56GbE dual QSFP28 NIC
Brand: NVIDIA
SKU: 900-9X426-0054-SQ0
Price: 338 USD
Availability: InStock

900-9X426-0054-SQ0 - NVIDIA 900-9X426-0054-SQ0 40/56GbE dual QSFP28 NIC | US IT Hardware

Product overview

The NVIDIA ConnectX-4 EN MCX414A-BCAT is a dual-port Ethernet network interface card designed for high-bandwidth environments. Identified by SKU 900-9X426-0054-SQ0, it delivers 40GbE and 56GbE connectivity through QSFP28 interfaces, supporting bandwidth-intensive applications. The adapter is built on the ConnectX-4 EN Ethernet controller and fits into a PCIe 3.0 x8 slot, providing a standard server integration path for modern platforms. Dual QSFP28 ports allow flexible port configuration at 40GbE or 56GbE data rates, enabling scalable network architectures. The card is supplied with a tall, full-height bracket to match standard rack-mount server designs. As part of the NVIDIA networking portfolio, this adapter targets data centers and enterprise networks that require reliable, high-speed Ethernet connectivity with dual-port flexibility in a PCIe 3.0 x8 form factor.

Dual-port QSFP28 Ethernet connectivity
Supports 40GbE and 56GbE data rates
PCIe 3.0 x8 host interface
ConnectX-4 EN MCX414A-BCAT platform
Tall full-height bracket for standard servers
SKU 900-9X426-0054-SQ0 for consistent ordering

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Refunds within 14 days and replacements within 30 days of delivery with an RMA (25% restocking fee on customer-initiated returns), and every part carries our Standard 30-Day Warranty - see our return policy or contact US IT Hardware.

Featuring

Manufacturer part #	900-9X426-0054-SQ0
Brand	NVIDIA
Condition	Refurbished
Model	MCX414A-BCAT
Series	ConnectX-4 EN
Generation	ConnectX-4
Technology	Mellanox ConnectX-4 EN Ethernet controller
Description	NIC ConnectX-4 PCIe3 40/56GbE 2xSFP28 (MCX414A-BCAT)
Form Factor	Tall bracket; full-height PCIe card
Part Number	900-9X426-0054-SQ0
Adapter Type	ConnectX-4 EN Ethernet Network Interface Card

Best for

Data center networking
Suitable for data center hosts needing dual-port 40/56GbE connectivity, using QSFP28 interfaces to deliver high aggregate bandwidth across the fabric.
High bandwidth servers
Designed for servers that require 40GbE or 56GbE data rates via PCIe 3.0 x8, supporting applications that depend on sustained high-throughput Ethernet links.
Dual-port link aggregation
Supports dual QSFP28 ports, enabling link aggregation designs where two 40/56GbE ports are used to increase available bandwidth or provide redundant paths.
Standard rack-mount deployments
Ships with a tall full-height bracket, making it appropriate for standard rack-mount servers that require dual-port QSFP28 40/56GbE connectivity.
PCIe 3.0 x8 platform integration
Fits platforms offering PCIe 3.0 x8 slots, allowing integration of dual-port 40/56GbE Ethernet capabilities without altering existing chassis layouts.

Frequently asked questions

What Ethernet speeds does the NVIDIA ConnectX-4 EN MCX414A-BCAT support?

Details

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Bracket Type	Tall bracket

Product Line	ConnectX-4 EN

Product Type	Ethernet network interface card

RDMA Support	RDMA over Converged Ethernet (RoCE) versions 1 and 2

Bracket Included	Tall (full-height) bracket included

Supported Protocols	Ethernet with RDMA over Converged Ethernet (RoCE)

Offload Technologies	RoCE v1, RoCE v2, SR-IOV

PCI Express Signaling Rate	PCIe Gen3 at 8.0 GT/s per lane

Intended Application Segment	Enterprise data center and cloud Ethernet networking

SR-IOV Virtualization Support	Single Root I/O Virtualization (SR-IOV) supported

Aggregate Maximum Ethernet Throughput	up to 112 GbE (2 × 56 GbE)

Networking Ports & Interfaces

Port Type	QSFP28
Connector Type	2 x QSFP28 ports for copper or optical cables
Host Interface	PCIe 3.0 x8
Interface Type	PCIe Gen 3.0 x8
Network Interface	40/56GbE Ethernet
Ethernet Data Rate	40GbE; 56GbE
Port Configuration	Dual-port QSFP28
Number of Ethernet Ports	2
Supported Ethernet Speeds	40 GbE and 56 GbE
Per-Port Maximum Ethernet Data Rate	56 GbE per port

NVIDIA 900-9X426-0054-SQ0 40/56GbE dual QSFP28 NIC