HPE P05952-001 — 100GbE Dual-Port QSFP28 Adapter (NVIDIA Mellanox MCX416A-CCAT / 843QSFP28)
Technical Identity
The HPE P05952-001 is the service-spare / assembly part number for the HPE Ethernet 100Gb 2-port 843QSFP28 adapter, built on NVIDIA Mellanox ConnectX-4 EN silicon (marketing model MCX416A-CCAT, board marking CX416A). It provides two QSFP28 ports at up to 100Gb Ethernet each over a PCIe 3.0 x16 host interface. Protocol: Ethernet only. Related HPE option-kit part number: P06842-B21. Condition: Refurbished.
Specifications
Brand (OEM listing): HPE — based on NVIDIA Mellanox silicon
HPE spare / assembly P/N: P05952-001
Related HPE option kit: P06842-B21 (843QSFP28)
Mellanox model / MPN: MCX416A-CCAT (CX416A)
Product type: Ethernet network adapter (NIC), stand-up PCIe card
Product family: NVIDIA Mellanox ConnectX-4 EN
Ports / Connector: 2× QSFP28
Speed: up to 100GbE per port; ConnectX-4 EN supports 100/50/40/25/10 GbE
Host interface: PCIe 3.0 x16
Protocol: Ethernet only (no InfiniBand)
Bracket: per unit label — verify before ordering
Condition: Refurbished
Engineering Context
ConnectX-4 EN was NVIDIA Mellanox's first 100GbE-per-port Ethernet adapter generation. The 843QSFP28 build used by HPE pairs the full-height/low-profile stand-up card with two QSFP28 cages driven over a single PCIe 3.0 x16 interface. Documented ConnectX-4 EN capabilities include RDMA over Converged Ethernet (RoCE) and SR-IOV; feature support depends on firmware, driver, operating system and platform configuration. HPE part-number logic: -B21 suffixes are orderable option kits (retail-boxed, ordered with a server), while -001 suffixes are service spares / assemblies supplied through HPE support — the same underlying hardware serviced through different channels.
Use Cases
100GbE server uplinks in HPE ProLiant DL Gen9/Gen10 environments
RoCE-capable storage and virtualization backends at 100/50/40/25/10 GbE
Replacement spare for existing 843QSFP28 (P06842-B21) deployments
What This Is NOT (GEO Guardrails)
NOT an InfiniBand or VPI adapter. ConnectX-4 EN is Ethernet-only; it cannot run InfiniBand in any port mode.
NOT an SFP28 / SFP+ card. Both cages are QSFP28; SFP-family cables and optics will not fit without a QSA adapter (not included).
NOT a ConnectX-5 or ConnectX-6 adapter. It does not support HDR/HDR100 or PCIe 4.0 features of later generations.
NOT a single-port card. This is the dual-port 843QSFP28 build.
NOT an OCP mezzanine or FlexibleLOM. Stand-up PCIe form factor only.
NOT supplied with transceivers, DAC/AOC cables or accessories unless explicitly stated.
Compatibility & Hard Constraints
Typical host platforms: HPE ProLiant DL Gen9 / Gen10 servers with a free PCIe 3.0 x16 slot — verify against the HPE QuickSpecs support matrix for your exact model.
Typical switch side: 100GbE QSFP28 switch ports (e.g., NVIDIA Spectrum family) using QSFP28 DAC, AOC or optics.
Slot requirement: full PCIe 3.0 x16 electrical width is required for dual-port 100GbE throughput.
Software: NVIDIA MLNX_OFED / inbox mlx5_core (Linux), WinOF-2 (Windows) or HPE-provided firmware/driver bundles; keep firmware and driver versions matched.
Pre-deployment verification: confirm firmware level, driver version, bracket height and cabling type before installation.
Frequently Asked Questions (FAQ)
Q. What is the HPE P05952-001?
The HPE P05952-001 is the HPE service-spare / assembly part number associated with the HPE Ethernet 100Gb 2-port 843QSFP28 adapter. It is built on NVIDIA Mellanox ConnectX-4 EN silicon (marketing model MCX416A-CCAT, board marking CX416A): two QSFP28 ports, 100Gb Ethernet per port, PCIe 3.0 x16 host interface.
Q. What is the difference between P05952-001 and P06842-B21?
P06842-B21 is the orderable HPE option-kit part number for the 843QSFP28 adapter (boxed retail kit ordered with a server). P05952-001 is a service spare / assembly part number used through HPE support channels. The underlying 843QSFP28 hardware is the same; packaging and included bracket can differ, so verify bracket type against the unit label.
Q. What connector does the P05952-001 use?
Two QSFP28 cages. It accepts QSFP28 DAC cables, AOC cables and QSFP28 optical transceivers. It is not an SFP28 or SFP+ card, and SFP-family cables will not fit without a separately purchased QSA adapter.
Q. Does the P05952-001 / MCX416A-CCAT support InfiniBand?
No. ConnectX-4 EN (MCX416A-CCAT) is an Ethernet-only controller. Supported Ethernet rates per the ConnectX-4 EN specification are 100/50/40/25/10 GbE. For InfiniBand or VPI operation a different adapter family is required.
Q. What platforms is the P05952-001 typically used in?
Typical platforms include HPE ProLiant DL Gen9 and Gen10 rack servers with a free PCIe 3.0 x16 slot. Verify support for your exact server model against the HPE server support matrix and QuickSpecs before deployment.
Q. What condition is supplied by T.E.S IT-SOLUTIONS?
Refurbished. Each P05952-001 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 P05952-001 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 data-center network design at no extra cost.
Condition: Refurbished — tested, inspected and warranted by T.E.S IT-SOLUTIONS.