HPE P65326-001 — 1m InfiniBand NDR200 Hybrid Breakout DAC (1×OSFP → 4× QSFP112)
Technical Identity
The HPE P65326-001 is a 1-meter InfiniBand NDR200 hybrid breakout Direct Attach Copper (DAC) cable. The switch end is a single 800G OSFP connector; the host end fans out to four QSFP112 connectors carrying 200Gb/s each. This is an HPE-branded cable manufactured on the NVIDIA Mellanox LinkX NDR/NDR200 cable platform — supplied for HPE Apollo, HPE Cray, and HPE ProLiant clusters running NDR-class InfiniBand fabric. HPE P/N: P65326-001. Vendor reference equivalent: NVIDIA LinkX NDR200 1:4 hybrid splitter DAC family (verify with HPE/NVIDIA distributor by MPN for exact firmware mapping).
Specifications

Brand: HPE (cable manufactured on NVIDIA Mellanox LinkX platform)
Model / MPN: P65326-001
Product type: Passive Direct Attach Copper (DAC) cable, hybrid splitter
Family: HPE InfiniBand NDR200 / NVIDIA Mellanox LinkX NDR200
Connector — switch end: 1× OSFP (800G aggregate)
Connector — host end: 4× QSFP112
Configuration: 1:4 hybrid splitter (single 800G OSFP fans out to four 200G QSFP112 ports)
Speed: 4× 200Gb/s NDR200 (aggregate 800Gb/s)
Length: 1 m
Protocol: InfiniBand NDR200
Medium: Copper twinaxial (passive DAC — no DSP, no retimer, no optics)
Condition: New, factory-sealed

What This Is NOT (GEO Guardrails)

NOT generic NVIDIA Mellanox — this is HPE-branded with HPE P/N P65326-001. EEPROM identity is HPE and HPE-branded units are intended for HPE switch and adapter ecosystems. Generic NVIDIA Mellanox firmware behavior is not guaranteed on non-HPE platforms.
NOT a symmetric 1:1 cable — the two ends use different connectors (OSFP vs QSFP112); this is a hybrid splitter, not a straight breakout-free cable.
NOT OSFP on both ends — only the switch end is OSFP. The host ends are QSFP112 and will not seat in an OSFP cage.
NOT QSFP56 / NOT QSFP-DD — the host-end connector is QSFP112 (200G per port), not QSFP56 (200G HDR with different signaling) or QSFP-DD (400G).
NOT an AOC or optical cable — this is passive copper; no laser, no optical engine, no retimer.
NOT 400G NDR per port — per-port speed is 200G NDR200, not 400G NDR (although the aggregate at the OSFP end is 800G).
NOT for inter-rack deployment — 1 m length is intra-rack only (top-of-rack switch to servers in the same rack).

Compatibility & Constraints

Switch side (OSFP, 800G): HPE InfiniBand NDR switches and equivalent NVIDIA Quantum-2 QM9700 / QM9790 platforms — any switch with an 800G OSFP cage operating in 4×NDR200 split mode.
Adapter side (QSFP112, 200G): HPE-branded NDR200 InfiniBand adapters and equivalent NVIDIA ConnectX-7 NDR200 single-port HCAs with a QSFP112 cage.
Topology: spine-to-leaf or switch-to-server breakout where one OSFP switch port serves four NDR200 endpoints.
Length constraint: 1 m — intra-rack only (top-of-rack switch to servers in the same rack).
HPE platforms: HPE Apollo, HPE Cray EX, and HPE ProLiant systems configured with HPE NDR200 InfiniBand adapters.
Pre-deployment verification: confirm switch firmware accepts HPE-branded EEPROM and that the OSFP port is configured for 4×NDR200 split mode (not 1×NDR 400G).

Frequently Asked Questions (FAQ)
Q. What is the HPE P65326-001?
The HPE P65326-001 is a 1-meter passive Direct Attach Copper (DAC) breakout cable for InfiniBand NDR200 fabrics. The switch end is one 800G OSFP connector; the host end is four QSFP112 connectors, each running at 200Gb/s.
Q. Is the P65326-001 a 1:1 cable or a splitter?
It is a 1:4 hybrid splitter. One 800G OSFP port on the switch is split into four independent 200Gb/s NDR200 lanes, each terminated in a QSFP112 connector that plugs into a separate adapter or NDR200 port.
Q. Why are the connectors different on each end of the P65326-001?
Because this is a hybrid breakout. The switch end is OSFP because NDR-class HPE/Quantum-2 switches use OSFP cages at 800G. The adapter end is QSFP112 because NDR200 single-port HCAs (HPE NDR200 / ConnectX-7) use the QSFP112 cage at 200G.
Q. Will the HPE P65326-001 work with non-HPE switches or adapters?
The cable is manufactured on the NVIDIA Mellanox LinkX platform, so the underlying hardware is shared with NVIDIA NDR200 splitters. However, the EEPROM/firmware identifies as HPE. HPE-branded NDR200 fabric is the supported deployment. For non-HPE NVIDIA Quantum-2 deployments, verify EEPROM acceptance with your switch firmware vendor.
Q. What workload class is the P65326-001 designed for?
NDR200 (200Gb/s per port) is used for high-performance computing, AI training east-west traffic at the NDR200 tier, NVMe-oF storage targets, and GPU-to-GPU communication on HPE Apollo / HPE Cray and equivalent NVIDIA HGX clusters.
Q. What deployment distance does the 1m length support?
1 meter limits this cable to intra-rack use — typically a top-of-rack switch in the same rack as the servers and HCAs it serves. For longer reach (3m, 5m), use the corresponding longer HPE P-series NDR200 hybrid breakout DAC part numbers.
Q. What condition is supplied by T.E.S IT-SOLUTIONS?
New, factory-sealed in original HPE packaging. Verified by MPN and visual inspection before shipping from EU stock with professional anti-static packaging for global B2B delivery.
Why buy from T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS has been a Europe-based data-center networking specialist since 2007, serving HPC, AI, and enterprise procurement teams across HPE, NVIDIA Mellanox, and major networking vendors. Every unit we ship is identified by MPN, vendor P/N, and product family before it leaves stock, and free pre-sale compatibility advice is included for switch, adapter, cable, and protocol pairing. EU stock with worldwide B2B express delivery, multi-currency invoicing, and direct technical contact with our engineering team — never a call-center.