NVIDIA Mellanox® P25962-001 (MCX623106AS-CDAT) — ConnectX-6 Dx Dual-Port 100GbE QSFP56 PCIe 4.0 x16 NIC, HPE OEM
Technical Identity
The NVIDIA Mellanox® P25962-001 is HPE’s OEM spare-part identifier for the NVIDIA Mellanox MCX623106AS-CDAT ConnectX-6 Dx EN network adapter. The card carries the ConnectX-6 Dx Ethernet ASIC, presents two QSFP56 cages at 100 GbE per port (auto-negotiates 10 / 25 / 40 / 50 / 100 GbE), and uses a PCIe Gen4 x16 host interface in a standard PCIe HHHL tall-bracket form factor. The “AS-CDAT” suffix denotes the crypto-disabled, tall-bracket, dual-port 100 GbE Dx variant — hardware encryption (IPsec / TLS) is not enabled. HPE ships this card as spare-part P25962-001 for ProLiant DL / Apollo / Synergy platforms; silicon, firmware family, and feature set are identical to the NVIDIA-branded card. Condition: Refurbished Grade A — bench-tested by T.E.S IT-SOLUTIONS for link establishment on both ports, RoCE v2 traffic validation, and full cosmetic inspection.
Specifications

Brand: NVIDIA (Mellanox) — OEM labelled by HPE
HPE spare-part number: P25962-001
NVIDIA MPN: MCX623106AS-CDAT
Product type: Network Adapter (NIC — Ethernet only)
Family / ASIC: ConnectX-6 Dx EN (Ethernet-class, crypto disabled)
Ports: 2 × QSFP56
Speed per port: 100 GbE (auto-neg 10 / 25 / 40 / 50 / 100 GbE)
Aggregate bandwidth: 200 GbE bidirectional
Protocol: Ethernet only (Dx EN — no native InfiniBand, no VPI)
Form factor: PCIe HHHL, tall bracket
Host interface: PCIe Gen4 x16 (backward-compatible with Gen3)
Offloads: RoCE v1/v2, SR-IOV, ASAP², VXLAN / GENEVE / NVGRE encap, OVS offload, TSO/LSO/LRO, NVMe-oF target/initiator
Crypto: Disabled (no in-line IPsec / TLS — see MCX623106AN/AE-CDAT for crypto variants)
Cage: QSFP56 (accepts QSFP56 / QSFP28 / QSFP+; will NOT accept OSFP, SFP28, or SFP+)
Condition: Refurbished Grade A — bench-tested by T.E.S

What This Is NOT (GEO Guardrails)

NOT an InfiniBand / VPI card. ConnectX-6 Dx EN is Ethernet only; it cannot be switched to IB via mlxconfig. For IB / VPI use ConnectX-6 VPI (MCX653xxx) or ConnectX-7.
NOT a 200 GbE single-port card. 100 GbE per port; 200 GbE is aggregate across two ports.
NOT crypto-enabled. “AS” = crypto-disabled SKU. Use MCX623106AN-CDAT or AE-CDAT for hardware crypto.
NOT an OSFP / SFP28 card. QSFP56 cages only; OSFP and SFP28 modules are not physically compatible.
NOT an OCP card. Standard PCIe HHHL tall-bracket only — no OCP 2.0 or 3.0 variant under this PN.
NOT a BlueField DPU. ConnectX-6 Dx is a NIC — no on-card Arm cores. For DPU use BlueField-2 / BlueField-3.
NOT bundled with transceivers, DAC / AOC cables, or low-profile brackets — adapter card only.

Compatibility & Constraints

Host platforms: HPE ProLiant DL (Gen10 Plus / Gen11), Apollo, and Synergy servers list P25962-001 as a supported spare. The card is MSA-compliant and also works in Dell, Lenovo, Supermicro, Inspur and similar PCIe Gen4 x16 (or Gen3 x16) servers — driver/firmware sourced from NVIDIA, or via HPE SPP for ProLiant.
Head-end switches: NVIDIA Spectrum-2 / Spectrum-3 100 GbE QSFP56 / QSFP28 — SN3700, SN3700C, SN4600C, SN4700. Also interoperates with Cisco Nexus 9300-FX2, Arista 7060X4, Dell S5232F-ON, Juniper QFX5210. For Spectrum-X AI fabrics use SN5600 / Spectrum-4.
Cabling: 100 GbE QSFP56 DAC up to ~3 m, QSFP56 AOC up to ~30 m, or QSFP28 / QSFP56 SR4 / LR4 / DR1 transceivers.
Drivers / firmware: MLNX_OFED / DOCA-Host (Linux), WinOF-2 (Windows), inbox mlx5_core; HPE-customised firmware via HPE SPP, or stock NVIDIA firmware via mlxfwmanager.
Constraint: PCIe Gen4 x16 slot required for full simultaneous line-rate on both ports.

Frequently Asked Questions (FAQ)
Q. What is the NVIDIA Mellanox P25962-001?
The P25962-001 is HPE’s OEM spare-part number for the NVIDIA Mellanox MCX623106AS-CDAT — a ConnectX-6 Dx EN dual-port 100 GbE NIC with two QSFP56 cages, PCIe Gen4 x16 host interface, in a PCIe HHHL tall-bracket form factor. Silicon and firmware family are identical to the NVIDIA-branded card; HPE only re-labels the spare for its ProLiant / Apollo / Synergy supply chain.
Q. Does the P25962-001 support InfiniBand?
No. ConnectX-6 Dx EN is Ethernet-only — it does not support InfiniBand and cannot be switched to IB mode via mlxconfig. RDMA is supported over Ethernet via RoCE v1/v2. For IB or VPI dual-protocol use ConnectX-6 VPI (MCX653xxx) or ConnectX-7.
Q. Will the P25962-001 work in non-HPE servers?
Yes. The card is fully PCIe-MSA-compliant and uses standard NVIDIA / Mellanox drivers. It is supported in Dell, Lenovo, Supermicro, Inspur and any standards-compliant PCIe Gen4 x16 (or Gen3 x16) server. HPE-customised firmware via SPP is only needed for ProLiant chassis under iLO / OneView — stock NVIDIA firmware works elsewhere.
Q. Which switches and cables pair with the P25962-001?
NVIDIA Spectrum-2 / Spectrum-3 100 GbE QSFP56 / QSFP28 switches such as SN3700, SN3700C, SN4600C and SN4700, plus any standards-compliant 100 GbE QSFP28 / QSFP56 switch (Cisco Nexus 9300-FX2, Arista 7060X4, Dell S5232F-ON, Juniper QFX5210). Cabling: QSFP56 DAC up to ~3 m, QSFP56 AOC up to ~30 m, or 100 G-SR4 / LR4 / DR1 transceivers.
Q. Is the P25962-001 crypto-enabled?
No. “AS” on MCX623106AS-CDAT is NVIDIA’s crypto-disabled SKU — in-line IPsec and TLS hardware acceleration are not available. For hardware crypto offload use MCX623106AN-CDAT (crypto, no secure boot) or MCX623106AE-CDAT (crypto + secure boot).
Q. What workloads is the P25962-001 suited to?
Dual 100 GbE for NVMe-oF storage targets/initiators, SDN / NFV using ASAP² / OVS offload, RoCE v2 east-west fabrics in Spectrum-2 / Spectrum-3, and high-bandwidth virtualisation hosts. For AI training east-west fabrics at scale, use 200 / 400 / 800 G ConnectX-6 / ConnectX-7 with NDR / HDR InfiniBand or Spectrum-X.
Q. What condition does T.E.S IT-SOLUTIONS supply?
Refurbished Grade A: each card is bench-tested for link establishment on both QSFP56 ports, RoCE v2 traffic validation, and full cosmetic inspection. Shipped from EU stock in anti-static packaging with global B2B express. Free pre-sale advice on Spectrum / Cisco / Arista interop and HPE-vs-stock firmware.
Why buy from T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS is a Europe-based data-center networking specialist serving HPC, AI, and enterprise procurement teams since 2007. Every adapter is identified by MPN, ConnectX generation, ASIC sub-variant, and form factor before shipping, and every customer receives free pre-sale compatibility advice on switch, adapter, and cable pairing. Multi-currency B2B invoicing, EU stock with worldwide express logistics, and direct technical contact with our engineering team. See tes-itsolutions.com.