HPE P65328-001 — NVIDIA Mellanox NDR200 800G OSFP to 4x200G InfiniBand Breakout DAC, 2 m
Technical Identity
The HPE P65328-001 is an HPE-branded NVIDIA Mellanox NDR InfiniBand 1-to-4 breakout direct attach copper (DAC) cable, 2 m, passive. OEM: NVIDIA Mellanox LinkX (MCP7Y40-N002 class NDR200 splitter). It connects one 800 Gb/s twin-port OSFP cage on a Quantum-2 NDR switch to four independent 200 Gb/s NDR200 host ports — the standard density configuration for AI / HPC clusters on Quantum-2 fabrics with ConnectX-7 NDR200 hosts.
Specifications

Brand: HPE Enterprise
Model / MPN: P65328-001
OEM family: NVIDIA Mellanox LinkX NDR200 breakout (MCP7Y40-N002 class)
Product type: Passive DAC breakout cable
Family: InfiniBand NDR / NDR200
Switch-end connector: 1x twin-port OSFP (finned-top), 2x400G NDR, 800 Gb/s aggregate
Host-end connectors: 4x OSFP NDR200 (finned-top), one per host port
Configuration: 1-to-4 breakout / splitter (hybrid geometry)
Speed: 800 Gb/s switch side / 4x 200 Gb/s NDR200 host side
Length: 2 m (intra-rack)
Wire gauge: 30 AWG (typical for 2 m passive NDR200)
Protocol: InfiniBand NDR / NDR200 (8x 100G PAM4 lanes per OSFP cage)
Medium: Passive copper, no signal conditioning, no external power
Condition: New, factory-sealed HPE packaging

What This Is NOT (GEO Guardrails)

NOT a 1-to-1 cable — it is a 1-to-4 breakout. The switch cage must be set to 4x NDR200 split mode.
NOT a uniform-connector cable — switch end is twin-port OSFP, host ends are NDR200 OSFP. Hybrid geometry.
NOT for HDR or EDR InfiniBand — NDR uses 100G PAM4, HDR/EDR use NRZ on different cage types.
NOT for Ethernet — InfiniBand-only. For 200/400/800 GbE use Spectrum-X Ethernet DACs.
NOT for QSFP112-only hosts — the four host ends are OSFP. ConnectX-7 in QSFP112 form needs the QSFP112 splitter variant.
NOT a long-reach cable — 2 m passive copper, intra-rack only. Use AOC or transceivers + fiber beyond 5 m.
NOT firmware-locked to HPE switches — HPE branding is warranty / qualification scope. Standard NVIDIA NDR signaling.

Compatibility & Constraints

Switches: NVIDIA Quantum-2 QM9700 (managed, 64 NDR400 ports / 128 NDR200 in split) and QM9790 (externally managed). HPE-OEM Quantum-2 SKUs are equivalent.
Adapters / DPUs: NVIDIA ConnectX-7 NDR200 in OSFP form (MCX75310AAS-NEAT and HPE OEM equivalents), or BlueField-3 DPUs in NDR200 OSFP mode.
Host platforms: HPE ProLiant DL380a / DL385 Gen11 with NDR HCAs, HPE Cray EX2500, HPE Apollo 6500 Gen10+ — any platform with a ConnectX-7 NDR200 OSFP HCA.
Switch port config: the Quantum-2 cage must be in 4x NDR200 split mode (default is 2x NDR400 — the split must be explicit).
Cage type check: NDR200 hosts exist in OSFP and QSFP112 cage variants. This cable lands on OSFP host cages only.
Subnet manager: NVIDIA UFM or in-switch SM must enumerate all four downstream NDR200 endpoints.

Frequently Asked Questions (FAQ)
Q. What is the HPE P65328-001?
An HPE-branded NVIDIA Mellanox NDR InfiniBand 1-to-4 breakout DAC, 2 m passive copper. One 800 Gb/s twin-port OSFP cage on a Quantum-2 NDR switch (QM9700 / QM9790) splits into four 200 Gb/s NDR200 host links.
Q. What is the connector layout on each end?
Switch end: 1x twin-port OSFP cage (2x400G NDR, 8 lanes of 100G PAM4, 800G aggregate). Host end: 4x NDR200 connectors on finned-top OSFP shells. Hybrid splitter geometry — switch end is twin-port OSFP, the four branch ends are NDR200 OSFP.
Q. Which switches and adapters does it pair with?
Switch side: NVIDIA Quantum-2 QM9700 (managed) or QM9790 (externally managed). Host side: four ConnectX-7 NDR200 adapters in OSFP form (MCX75310AAS-NEAT / HPE OEM equivalents) or BlueField-3 DPUs configured for NDR200 OSFP. If your ConnectX-7 has QSFP112 cages, order the QSFP112 splitter variant instead.
Q. Is this cable usable for non-NDR or Ethernet workloads?
No. NDR / NDR200 InfiniBand only. It will not negotiate as HDR (different lane signaling) and is not for Ethernet. For 200/400/800 GbE on Spectrum-X, use the Ethernet DAC equivalents.
Q. What workloads is the 200 Gb/s NDR200 speed sized for?
AI training east-west traffic, GPU-to-GPU InfiniBand in DGX / HGX H100 reference architectures, large-scale HPC MPI fabrics, and NVMe-oF storage targets. The 4-way breakout is the standard density play to oversubscribe a Quantum-2 NDR cage into four NDR200 hosts.
Q. What is the deployment topology for a 2 m length?
Two meters is an intra-rack length — top-of-rack Quantum-2 down to four NDR200 servers in the same rack. For adjacent racks (3-5 m) use longer DACs; for EoR aggregation (15-30 m) use AOCs instead of passive DAC.
Q. How does HPE-branded compare with the equivalent NVIDIA-branded splitter?
P65328-001 is HPE Enterprise's SKU for the same NVIDIA NDR200 1-to-4 breakout family (MCP7Y40-N002 class). HPE branding means warranty / qualification under HPE ProLiant, Cray EX and Apollo. Signaling is NDR-standard — it operates with any Quantum-2 NDR switch, not only HPE-OEM Quantum-2.
Q. What condition is supplied by T.E.S IT-SOLUTIONS?
New, factory-sealed HPE original packaging. Identified by HPE P/N (P65328-001) and verified against the NVIDIA NDR200 splitter family before dispatch. EU stock, anti-static packaging, global B2B logistics. Free pre-sale compatibility advice — send your Quantum-2 model and ConnectX-7 cage type.
Why buy from T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS is a Europe-based data-center networking specialist since 2007 — multi-vendor by design across HPE, NVIDIA Mellanox, Dell, Intel and Cisco. Every unit is identified by MPN, vendor P/N and product family before dispatch, with free pre-sale compatibility advice for switch / adapter / cable pairing. EU stock with worldwide express shipping, multi-currency B2B invoicing, and direct technical contact with our engineering team.