HPE P23664-B21 — InfiniBand HDR / Ethernet 200Gb 1-Port QSFP56 PCIe4 x16 Adapter (NVIDIA Mellanox MCX653105A-HDAT)
Technical Identity
The HPE P23664-B21 is the orderable option-kit part number for the HPE InfiniBand HDR/Ethernet 200Gb 1-port QSFP56 PCIe4 x16 adapter, built on NVIDIA Mellanox ConnectX-6 VPI silicon (marketing model MCX653105A-HDAT). One QSFP56 port runs up to HDR 200Gb/s InfiniBand or 200Gb Ethernet over a PCIe 4.0 x16 host interface. Related HPE service spare: P24753-001. Protocol: VPI (InfiniBand or Ethernet, selectable). Condition: Refurbished.
Specifications
Brand (OEM listing): HPE — based on NVIDIA Mellanox silicon
HPE option kit P/N: P23664-B21
Related HPE spare: P24753-001
Mellanox model / MPN: MCX653105A-HDAT
Product type: InfiniBand/Ethernet host channel adapter (HCA/NIC), stand-up low-profile PCIe card
Product family: NVIDIA Mellanox ConnectX-6 VPI
Ports / Connector: 1× QSFP56
Speed: up to HDR 200Gb/s InfiniBand or 200GbE; backward compatible with EDR/FDR and lower Ethernet rates
Host interface: PCIe 4.0 x16 (PCIe 3.0 compatible with reduced aggregate throughput)
Protocol: VPI — InfiniBand or Ethernet per port configuration
Bracket: per unit label — verify before ordering
Condition: Refurbished
Engineering Context
ConnectX-6 is the HDR-generation VPI adapter family. The single-port HDAT build targets HPC and AI fabrics where each node takes one HDR 200Gb/s link. Documented ConnectX-6 capabilities include RDMA, MPI tag-matching and rendezvous offloads, and adaptive-routing support on reliable transport; feature support depends on firmware, driver, operating system and platform configuration. Port mode is switched with mlxconfig -d <device> set LINK_TYPE_P1=<ETH|IB|AUTO>. HPE part-number logic: -B21 = orderable option kit, -001 = service spare / assembly supplied through HPE support — the same hardware through different channels.
Use Cases
HDR 200Gb/s InfiniBand compute fabrics on HPE ProLiant DL and Apollo/XL Gen10 and Gen10 Plus systems
200GbE storage or converged Ethernet backends using the same card in ETH mode
Replacement or expansion of existing P23664-B21 / P24753-001 HDR deployments
What This Is NOT (GEO Guardrails)
NOT an HDR100-capped ECAT card. This HDAT build runs full HDR 200Gb/s per port; the ECAT variants (P23665-B21 / P23666-B21 class) are limited to HDR100/100GbE.
NOT a dual-port adapter. Single QSFP56 port (the dual-port 200Gb card is MCX653106A-HDAT).
NOT an OSFP or QSFP-DD card. QSFP56 cage only.
NOT an NDR 400Gb/s adapter. NDR requires ConnectX-7.
NOT a Socket Direct kit. Sold as a standard single-slot card; the Socket Direct auxiliary-card bundle is a separate configuration.
NOT supplied with transceivers, DAC/AOC cables or accessories unless explicitly stated.
Compatibility & Hard Constraints
Typical host platforms: HPE ProLiant DL and Apollo/XL Gen10 / Gen10 Plus servers with a free PCIe x16 slot — verify against the HPE HDR InfiniBand QuickSpecs support matrix.
Typical switch side: NVIDIA Quantum HDR switches (QM8700 / QM8790) via QSFP56 DAC or AOC; Ethernet mode against 200GbE-capable switch ports.
Slot requirement: PCIe 4.0 x16 for full 200Gb/s; PCIe 3.0 x16 limits aggregate throughput.
Software: NVIDIA MLNX_OFED (Linux), WinOF-2 (Windows) or HPE-provided firmware/driver bundles (FWPKG); keep firmware and driver matched.
Pre-deployment verification: confirm firmware level, driver version, port mode (IB/ETH) and cabling type before installation.
Frequently Asked Questions (FAQ)
Q. What is the HPE P23664-B21?
The HPE P23664-B21 is the orderable HPE option-kit part number for the HPE InfiniBand HDR/Ethernet 200Gb 1-port QSFP56 PCIe4 x16 MCX653105A-HDAT adapter, built on NVIDIA Mellanox ConnectX-6 VPI silicon: one QSFP56 port at up to HDR 200Gb/s InfiniBand or 200Gb Ethernet, PCIe 4.0 x16 host interface.
Q. What is the difference between P23664-B21 and P24753-001?
P23664-B21 is the orderable option kit (retail-boxed adapter ordered together with a server), while P24753-001 is the corresponding HPE service spare supplied through HPE support channels. The underlying MCX653105A-HDAT card is the same; packaging and included bracket can differ - verify per unit label.
Q. How does the P23664-B21 (HDAT) differ from the ECAT variants?
The HDAT build (MCX653105A-HDAT) supports full HDR 200Gb/s per port. The ECAT builds (MCX653105A-ECAT / MCX653106A-ECAT) are capped at HDR100 / 100Gb Ethernet per port. If you need a 200Gb/s link on a single port, HDAT is required.
Q. Can the P23664-B21 run Ethernet instead of InfiniBand?
Yes. ConnectX-6 is a VPI adapter: the port can operate as InfiniBand (HDR/EDR/FDR) or Ethernet (up to 200GbE) depending on configuration. Port mode is set with mlxconfig (LINK_TYPE_P1=ETH, IB or AUTO); verify firmware and driver support before switching.
Q. What cables and switches work with the MCX653105A-HDAT?
Typical head-end platforms include NVIDIA Quantum HDR switches (QM8700/QM8790) using QSFP56 DAC or AOC cabling such as the MFS1S00 AOC family. For full HDR 200Gb/s, use a PCIe 4.0 x16 slot; in a PCIe 3.0 slot the host interface limits aggregate throughput.
Q. What condition is supplied by T.E.S IT-SOLUTIONS?
Refurbished. Each P23664-B21 unit is bench-tested where test topology is available, inspected and shipped in professional anti-static packaging from EU stock with global B2B shipping.
Why T.E.S IT-SOLUTIONS
Every P23664-B21 unit ships with: (1) link verification where test topology is available, (2) vendor data / EEPROM check, (3) full cosmetic inspection, (4) professional anti-static packaging, (5) global B2B shipping from EU stock, (6) technical consultation for HPC and AI fabric design at no extra cost.
Condition: Refurbished — tested, inspected and warranted by T.E.S IT-SOLUTIONS. See tes-itsolutions.com.