What network speeds and protocols does the HPE P23665-B21 adapter support?

The Hewlett Packard Enterprise P23665-B21 is specified as an InfiniBand HDR100 and Ethernet 100Gb adapter. This means it is designed for 100Gb operation in both InfiniBand HDR100 environments and 100Gb Ethernet networks. The combination supports deployments that may rely on either protocol while using the same physical adapter model.

What type of host interface does the P23665-B21 network adapter use?

The P23665-B21 adapter connects to the server through a PCIe4 x16 interface. This interface aligns with modern server platforms that support PCIe 4.0 technology and provides substantial bandwidth for a 100Gb network connection. Ensuring the server has a compatible PCIe4 x16 slot is important for deployment planning.

How many network ports and what connector type are provided on this adapter?

The adapter is described as a 1-port solution that uses a QSFP56 connector for network connectivity. This single QSFP56 port supports 100Gb InfiniBand HDR100 or 100Gb Ethernet operation. Knowing it is a 1-port QSFP56 card helps in planning switch port usage and cabling requirements in the data center.

Is the P23665-B21 suitable for use in space-constrained server environments?

The product is categorized as a PCIe 4.0 x16 low-profile adapter, which is commonly selected for dense rack-mount and space-constrained installations. This low-profile classification indicates it is intended for servers that require compact adapter form factors while still delivering 100Gb connectivity through a single QSFP56 port.

Which brand and product level does the P23665-B21 belong to?

The P23665-B21 is a Hewlett Packard Enterprise network adapter classified at the enterprise product level. It is identified as the InfiniBand HDR100/Ethernet 100Gb 1-port QSFP56 PCIe4 x16 MCX653105A-ECAT adapter. This classification positions it for enterprise-grade deployments that demand consistent 100Gb connectivity.

P23665-B21 - HPE Hewlett Packard Enterprise P23665-B21 100Gb 1-port adapter

Name: HPE Hewlett Packard Enterprise P23665-B21 100Gb 1-port adapter
Brand: HPE
SKU: P23665-B21
Price: 448 USD
Availability: InStock

P23665-B21 - HPE Hewlett Packard Enterprise P23665-B21 100Gb 1-port adapter | US IT Hardware

Product overview

The Hewlett Packard Enterprise P23665-B21 is an InfiniBand HDR100 and Ethernet 100Gb network adapter designed for enterprise environments that require high-bandwidth connectivity. This adapter provides a single 100Gb port using a QSFP56 interface, supporting both InfiniBand HDR100 and Ethernet 100Gb operation. It connects to the host system using a PCIe4 x16 interface, aligning with modern server platforms that need substantial I/O throughput. The product belongs to the low-profile PCIe 4.0 x16 adapter category, making it suitable for space-constrained rack-mount systems where compact form factors are important. As an enterprise-level network adapter, it is positioned for use in demanding data center or clustered server deployments where consistent, high-speed network performance is required. All characteristics described are based strictly on the provided model and category information.

InfiniBand HDR100 and Ethernet 100Gb capability
Single 100Gb network port for dedicated links
QSFP56 connector for 100Gb cabling
PCIe 4.0 x16 host interface
Enterprise-focused network adapter design
Suitable for high-bandwidth server connectivity

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Featuring

Manufacturer part #	P23665-B21
Brand	HPE
Condition	Refurbished
Model	MCX653105A-ECAT
Data Rate	Up to 100 Gb
Device Type	Network adapter
Form Factor	Standup low-profile plug-in card
Product Line	HPE InfiniBand HDR100/Ethernet 100Gb Adapters
Product Type	Network adapter
Supported Cables	DAC and AOC
Product Description	HPE InfiniBand HDR100/Ethernet 100Gb 1-port QSFP56 PCIe4 x16 adapter for ProLiant servers

Compatible systems

P23665-B21 is an HPE InfiniBand HDR100/100GbE PCIe 4.0 adapter for select ProLiant DL Gen10 servers.

Hewlett Packard Enterprise ProLiant DL
Model: DL325 Gen10
Form factor: Rack
Generation: Gen10
Listed on CDW as compatible with HPE P23665-B21 adapter.
Hewlett Packard Enterprise ProLiant DL
Model: DL345 Gen10
Form factor: Rack
Generation: Gen10
Listed on CDW product description for P23665-B21.
Hewlett Packard Enterprise ProLiant DL
Model: DL365 Gen10
Form factor: Rack
Generation: Gen10
Included in CDW supported list for P23665-B21.
Hewlett Packard Enterprise ProLiant DL
Model: DL380 Gen10
Form factor: Rack
Generation: Gen10
CDW notes P23665-B21 is for DL380 Gen10 among others.

Best for

Enterprise networking
Suitable for enterprise environments that require an InfiniBand HDR100 and Ethernet 100Gb 1-port QSFP56 adapter with PCIe4 x16 connectivity for high-bandwidth server links.

Details

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Bus Type (datasheet)	PCIe 4.0 x8 electrical

Server Type Supported	HPE ProLiant DL Rack Mount Gen10 Plus servers

Supported InfiniBand Speed	100Gb InfiniBand HDR100

Supported ProLiant Servers (examples)	ProLiant DL325 Gen10; DL345 Gen10; DL365 Gen10; DL380 Gen10

Networking Ports & Interfaces

Ports	1 x 100Gb Ethernet / 100Gb InfiniBand
Connector Type	QSFP56
Interface Port Type	QSFP28 / QSFP56
PCIe Interface Form	PCIe 4.0 x16 standup card
Interface (Bus) Type	PCI Express 4.0 x16
Supported Ethernet Speeds	1GbE; 10GbE; 25GbE; 40GbE; 50GbE; 100GbE

HPE Hewlett Packard Enterprise P23665-B21 100Gb 1-port adapter