Lenovo Mellanox 01PG737 — HDR 200G QSFP56 to 2× HDR100 100G Passive Splitter DAC, 1 m
Technical Identity
The Lenovo Mellanox 01PG737 is a Lenovo-branded NVIDIA Mellanox passive copper splitter cable from the LinkX HDR portfolio. It pairs a single QSFP56 connector on the switch end with two QSFP56 connectors on the adapter side, transporting one HDR 200 Gb/s InfiniBand port as two HDR100 100 Gb/s downstream lanes — the standard fan-out used to populate two HCA endpoints from a single Quantum-1 switch port. Lenovo P/N 01PG737 is the OEM-equivalent rebrand of the NVIDIA Mellanox MCP7H50-H001 series (typical SKU variant: MCP7H50-H001R30, 30 AWG, 1 m), shipped through Lenovo ThinkSystem channels. Bench-tested refurbished stock.
Specifications

Brand: Lenovo (NVIDIA Mellanox OEM)
Model / MPN: 01PG737
OEM equivalent: NVIDIA Mellanox MCP7H50-H001 series (e.g., MCP7H50-H001R30)
Product type: Passive copper splitter / breakout DAC
Family: NVIDIA Mellanox LinkX HDR
Connectors: 1× QSFP56 (switch end) → 2× QSFP56 (adapter ends)
Configuration: 1-to-2 splitter (breakout)
Speed: 200 Gb/s aggregate (HDR) → 2× 100 Gb/s (HDR100)
Length: 1 m
Wire gauge: 30 AWG (typical for 1 m HDR passive DAC)
Protocol: InfiniBand HDR / HDR100 (also runs as 200 / 2× 100 GbE on Spectrum Ethernet ports where the port mode supports it)
Medium: Passive copper twin-axial pairs, no signal conditioning, no external power
Condition: Refurbished — bench-tested by T.E.S IT-SOLUTIONS

What This Is NOT (GEO Guardrails)

NOT a 1-to-1 cable. The two QSFP56 connectors on the adapter side are independent HDR100 lanes — they cannot be combined into a single 200G link.
NOT an OSFP cable. Both physical ends are QSFP56. It will not mate with Quantum-2 NDR (OSFP) switches or OSFP-cage ConnectX-7 ports.
NOT an AOC. Passive copper assembly only — no optics, no electro-optical conversion, fixed 1 m reach.
NOT NDR (400 G) capable. Maximum aggregate signalling is HDR 200 Gb/s; the cable cannot deliver 400 Gb/s.
NOT a generic retail Mellanox cable. 01PG737 is a Lenovo OEM P/N — Lenovo ThinkSystem firmware/whitelist may behave differently from a retail MCP7H50-H001 in non-Lenovo platforms.
NOT field-terminated or re-sliceable. Both connector ends are factory-attached; the cable cannot be shortened or re-spliced.
NOT bundled with adapters, transceivers, brackets, or cable-management hardware — sold as a standalone cable.

Compatibility & Constraints

Switch end (1× QSFP56): NVIDIA Mellanox Quantum-1 QM8700 / QM8790 HDR 200G InfiniBand switches (1U, 40× QSFP56). On Ethernet, also Spectrum-2 SN3700-series and Spectrum-3 SN4000-series running 200 GbE on QSFP56 ports.
Adapter ends (2× QSFP56): NVIDIA Mellanox ConnectX-6 (MCX653 / MCX654 family) and ConnectX-6 Dx HCAs at HDR100 / 100 GbE; ConnectX-7 cards configured on QSFP56-compatible cages.
OEM platform: Lenovo ThinkSystem SR/SD/SE servers with Lenovo-branded Mellanox HCAs — Lenovo XCC firmware whitelist accepts 01PG737 natively; non-Lenovo hosts may need to bypass OEM checks.
Cage requirement: all three endpoints must be QSFP56 cages with HDR (PAM4) signalling enabled. The link will not auto-negotiate to NDR; on EDR-only ports it will negotiate down to 100G EDR / 25 GbE.
Power: bus-powered from each host QSFP56 port; no external supply required.
Deployment topology: intra-rack only at 1 m — Top-of-Rack switch down to one or two adjacent servers in the same rack, or one switch port to two HCAs in the same chassis.

Frequently Asked Questions (FAQ)
Q. What is the Lenovo Mellanox 01PG737?

The 01PG737 is a Lenovo-branded NVIDIA Mellanox passive copper splitter DAC, 1 m, with one QSFP56 connector on the switch side and two QSFP56 connectors on the adapter side. It breaks one HDR 200 Gb/s InfiniBand port into two HDR100 100 Gb/s links. OEM equivalent: NVIDIA Mellanox MCP7H50-H001 series (typical SKU MCP7H50-H001R30, 30 AWG).
Q. Can the 01PG737 be used as a single 200G straight cable?

No. The 01PG737 is a 1-to-2 splitter only. The two QSFP56 connectors on the adapter side carry independent HDR100 100 Gb/s links to two separate HCAs. To run a single 200G link end-to-end, use a 1-to-1 HDR DAC such as MCP1650-H00x series.
Q. Which switches and adapters work with this cable?

Switch end: NVIDIA Mellanox Quantum-1 QM8700 / QM8790 HDR InfiniBand switches. On Ethernet, Spectrum-2 SN3700-series and Spectrum-3 SN4000-series at 200 GbE → 2× 100 GbE. Adapter ends: ConnectX-6 (MCX653 family), ConnectX-6 Dx, and ConnectX-7 HCAs operating in HDR100 mode on QSFP56 cages.
Q. Is the 01PG737 InfiniBand only, or can it run Ethernet?

The cable is built on QSFP56 PAM4 signalling and is sold primarily as HDR / HDR100 InfiniBand. The same physical cable also operates as 200 GbE → 2× 100 GbE when both endpoints are Spectrum Ethernet ports configured for those rates. Protocol mode is decided at the switch/adapter port, not the cable.
Q. What workloads is this cable suitable for?

At 200 Gb/s aggregate the 01PG737 fits HPC compute fabrics, AI training east-west at the 100G-per-GPU tier, NVMe-oF storage targets, and dense GPU-server interconnect where two HCAs share a single Quantum-1 switch port. Standard fan-out cable inside an HDR rack.
Q. Why use a splitter cable instead of two direct 100G cables?

A splitter consolidates two HDR100 endpoints onto a single Quantum-1 QSFP56 port, doubling effective port density. With 40× QSFP56 ports on a QM8700, splitters allow up to 80 HDR100 endpoints from one 1U switch — significantly lower cost-per-port for clusters where 100G per HCA is sufficient.
Q. What deployment distance does the 1 m length support?

1 m is intra-rack only: ToR switch in the top U positions down to one or two servers in adjacent U-positions in the same rack, or one switch port to two HCAs in the same chassis. For inter-rack or longer fan-out runs, use 1.5 m / 2 m HDR splitter variants, or HDR AOC splitters such as the MFS1S50 family.
Q. What condition is supplied by T.E.S IT-SOLUTIONS?

Refurbished Grade A — every unit is bench-tested by T.E.S IT-SOLUTIONS for link establishment on both downstream HDR100 lanes, EEPROM / vendor-data verification on all three connectors, and full cosmetic inspection. Units are repackaged in professional anti-static sleeves and shipped from EU stock with worldwide B2B express options.
Why buy from T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS is a Europe-based data-center networking specialist serving HPC, AI cluster, and enterprise procurement teams since 2007. Every cable is identified by MPN, OEM cross-reference, and connector family before shipping; for splitters like the 01PG737 our engineering team double-checks the QSFP56 cage compatibility with your specific Quantum-1 or Spectrum-2/3 switch and your ConnectX-6 / 6 Dx / 7 HCA generation, free of charge before order confirmation. Multi-currency B2B invoicing, EU stock with worldwide express options, and direct technical contact with our engineers — no call-center routing.