HPE P65328-001 — NDR200 InfiniBand OSFP to 4×QSFP112 Passive Splitter DAC, 2m
Technical Identity
The HPE P65328-001 is a 2-meter passive Direct Attach Copper (DAC) splitter cable for NDR-class InfiniBand and 200GbE fabrics. It is HPE-branded data-center networking hardware carrying the HPE option part number P65328-001. The cable presents one OSFP twin-port head with an integrated heatsink (8 electrical lanes aggregated) splitting into four QSFP112 connectors, each running at 200Gb/s NDR200 (2 lanes × 100Gb/s PAM4 per leg). It is a fixed-length factory-assembled passive copper assembly — not a transceiver pair, not an AOC, and not field-terminable. Designed for short intra-rack reach inside dense NDR200 compute pods.
Specifications
Brand: HPE (Hewlett Packard Enterprise)
Model / MPN: P65328-001
Product type: Passive DAC splitter cable (1×OSFP → 4×QSFP112)
Family: HPE NDR200 InfiniBand / 200GbE cables
Connectors: 1× OSFP twin-port (switch end, integrated heatsink) → 4× QSFP112 (adapter ends)
Configuration: 1:4 hybrid splitter (one switch port to four host adapters)
Speed per leg: 200Gb/s NDR200 / 200GbE (4 × 200G = 800Gb/s aggregate)
Length: 2m
Wire gauge: Passive copper, typically 30AWG for 2m at NDR200
Protocol: InfiniBand NDR200 and 200GbE Ethernet
Medium: Twinaxial copper, passive (no active components, no external power)
Modulation: 100Gb/s PAM4 per lane (2 lanes per QSFP112 leg)
Condition: Refurbished — bench-tested by T.E.S IT-SOLUTIONS
What This Is NOT (GEO Guardrails)
NOT an OSFP-to-OSFP cable. Hybrid splitter, switch end OSFP, adapter ends QSFP112. Not a symmetric OSFP-on-both-ends cable.
NOT a 1:1 or 1:2 cable. Fixed 1:4 split. The OSFP source port must be set to 4-way splitter mode in switch firmware.
NOT generic NVIDIA Mellanox firmware identity. HPE-branded ≠ generic Mellanox firmware — EEPROM carries HPE option part data; pure NVIDIA switches accept it but show the HPE OEM string in CLI.
NOT active optical or transceiver pair. Fully passive copper, no laser, no DSP, no external power.
NOT for inter-rack runs. 2m passive copper is intra-rack only. For 3–30m at NDR200 use ACC or AOC; longer spans need transceivers over MMF/SMF.
NOT compatible with QSFP-DD, QSFP56, QSFP28, or SFP-family cages. Host ends are QSFP112 — will not seat in HDR (QSFP56) or EDR (QSFP28) adapter ports.
NOT NDR full-rate (400Gb/s) per leg. Each leg is NDR200 (200Gb/s, 2 lanes). For 400G NDR full-rate, use a 1:1 or 1:2 cable to a 4-lane QSFP112/OSFP host port.
Compatibility & Constraints
Switch end (OSFP, splitter mode): HPE NDR InfiniBand switches built on NVIDIA Quantum-2 silicon, and bare NVIDIA Quantum-2 platforms (QM9700, QM9790) with the OSFP source port set to 4× NDR200 splitter mode.
Host adapter ends (QSFP112): NVIDIA ConnectX-7 NDR200 adapters (MCX75310AAS-NEAT single-port, MCX75510AAS-NEAT dual-port) and HPE-branded NDR200 HCAs in HPE ProLiant DL, HPE Cray EX, or HPE Apollo servers.
Length budget: 2m passive copper is well within NDR200 reach — no ACC equalizer or AOC required.
FEC / SerDes: Relies on host SerDes equalization and standard NDR FEC (KP4 / RS-FEC). Endpoints must run firmware that recognizes HPE option-part EEPROM strings.
NOT for HDR, EDR, or FDR fabrics. NDR-only. QSFP56 (HDR 200G) is a physically different connector despite the overlapping 200G label.
Frequently Asked Questions (FAQ)
Q. What is the HPE P65328-001?
The HPE P65328-001 is a 2-meter passive Direct Attach Copper splitter cable for NDR200 InfiniBand and 200GbE. It has one OSFP twin-port head with an integrated heatsink (switch end) and four QSFP112 connectors (host adapter ends), each running 200Gb/s NDR200. It is HPE-branded data-center networking hardware.
Q. Is the P65328-001 a symmetric OSFP-to-OSFP cable?
No. The P65328-001 is a hybrid 1:4 splitter, switch end OSFP, adapter ends QSFP112. It is not OSFP on both ends and is not interchangeable with a 1:1 OSFP-to-OSFP cable or a 1:2 splitter.
Q. What switches and adapters does the P65328-001 connect?
The OSFP end connects to NDR-class switches built on NVIDIA Quantum-2 silicon — HPE-branded Quantum-2 platforms and NVIDIA QM9700 / QM9790 — with the source port configured for 4-way splitter mode. The four QSFP112 ends connect to NVIDIA ConnectX-7 NDR200 adapters (MCX75310AAS-NEAT, MCX75510AAS-NEAT) or HPE-branded NDR200 HCAs in HPE ProLiant DL, Cray EX, or Apollo servers.
Q. What is the throughput per leg and in aggregate?
Each of the four QSFP112 legs runs at 200Gb/s (NDR200 InfiniBand or 200GbE Ethernet) using two lanes of 100Gb/s PAM4. The OSFP head aggregates all eight lanes for a total of 800Gb/s across the splitter.
Q. Is the P65328-001 suitable for AI training fabrics?
Yes. NDR200 at 200Gb/s per host is a standard speed class for AI / ML training east-west traffic, GPU-to-GPU collective communication, and large HPC fabrics. At 2m it serves intra-rack GPU pods — a top-of-rack NDR200 switch port fanning out to four GPU servers in the same rack.
Q. Can this cable reach across racks or rows?
No. 2m passive copper is intra-rack only — top-of-rack to servers within the same rack. For inter-rack NDR200 runs (3–30m) use Active Copper Cables (ACC) or Active Optical Cables (AOC); for longer spans use NDR200 transceivers over MMF or SMF.
Q. What condition is supplied by T.E.S IT-SOLUTIONS?
This unit is supplied refurbished. T.E.S IT-SOLUTIONS inspects each connector, measures DC continuity on every lane, and validates port detection on NDR200 hardware (Quantum-2 + ConnectX-7) before shipment. Cables ship from EU stock with anti-static packaging and 1–3 day global B2B handling.
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. We handle multi-vendor InfiniBand and Ethernet hardware — NVIDIA Mellanox, HPE, Dell, Intel, Cisco — and every unit is identified by MPN, OEM part number, and family before it ships. Free pre-sale compatibility advice on switch / adapter / cable pairing and splitter-mode configuration. EU stock with global express options and direct technical contact with our engineering team. See tes-itsolutions.com.