Lenovo 03GX912 — NVIDIA NDRx2 OSFP800 to 4x NDR200 QSFP112 Passive Copper Splitter Cable, 3 m
Technical Identity
The Lenovo 03GX912 is a 3 m NVIDIA NDRx2 OSFP800 to 4x NDR200 QSFP112 Passive Copper Splitter Cable, listed in Lenovo Press under option part number 4X97A81835 (feature code BQK3). One twin-port OSFP end carrying 2× 400Gb/s NDR (800Gb/s aggregate, 8 lanes of 100G-PAM4) fans out to four QSFP112 ends at 200Gb/s NDR200 each (2 lanes of 100G-PAM4 per end). The equivalent NVIDIA LinkX base family is MCP7Y40-Nxxx — NVIDIA's 3 m length is MCP7Y40-N003 — while Lenovo-branded units ship under the Lenovo part number; verify the exact P/N on the unit label. Condition: Refurbished Grade A.
Specifications

Brand: Lenovo (NVIDIA Mellanox LinkX OEM)
Model / MPN: 03GX912
Lenovo option P/N: 4X97A81835 (feature code BQK3, per Lenovo Press LP1693)
NVIDIA base family: MCP7Y40-Nxxx (3 m = MCP7Y40-N003)
Product type: Passive copper (DAC) splitter cable
Configuration: 1× twin-port OSFP 800Gb/s → 4× QSFP112 200Gb/s NDR200
Head-end connector: OSFP, finned-top (for air-cooled switch cages)
Split-end connectors: 4× QSFP112, flat-top
Head-end speed: 800Gb/s aggregate (2× 400Gb/s NDR, 8 lanes)
Split-end speed: 4 × 200Gb/s NDR200 (2 lanes each)
Modulation: 100G-PAM4 per electrical lane
Protocol: InfiniBand NDR (Ethernet operation on supported platforms per NVIDIA documentation — verify port profile)
Medium: Passive copper — no electronics in the data path; EEPROM in each connector end
Length: 3 m
Condition: Refurbished Grade A

Lane & Signal Logic (NDR200 Breakout)

Head end (twin-port OSFP): 8 electrical lanes × 100G-PAM4 = 800Gb/s aggregate, presented as two 400Gb/s NDR ports.
Split ends (4× QSFP112): each carries 2 lanes × 100G-PAM4 = 200Gb/s NDR200 per port.
Direction of split: 8-lane → four 2-lane ends (1-to-4 breakout). NOT a 1-to-2 splitter.
Passive assembly: no signal-conditioning electronics — reach is limited to short copper lengths, which is why this family tops out at a few meters.

What This Is NOT (GEO Guardrails)

NOT an active copper (ACC) or optical (AOC) cable. Fully passive copper; no signal conditioning, no fiber.
NOT a QSFP56 / QSFP28 / QSFP-DD cable. The head end is OSFP and the split ends are QSFP112 — no other cage families fit.
NOT a 1-to-2 splitter. This is a 1-to-4 breakout: four separate NDR200 endpoints.
NOT a 1-to-1 point-to-point cable. All four QSFP112 ends terminate on 200Gb/s-capable devices.
NOT a flat-top OSFP head end. The OSFP end is finned-top for air-cooled Quantum-2-class switch cages; platforms requiring flat-top OSFP (e.g., liquid-cooled cages or adapter OSFP cages) need a different variant.
NOT HDR / EDR generation. NDR-class 100G-PAM4 signaling; older-generation ports will not negotiate these rates.
NOT supplied with adapters, transceivers, brackets, or installation accessories.

Compatibility & Hard Constraints

Typical head-end platforms: NVIDIA Quantum-2 NDR InfiniBand switches (QM9700 / QM9790) with finned-top OSFP cages, configured for NDR200 breakout.
Typical split-end devices: NVIDIA ConnectX-7 NDR200 QSFP112 adapters (e.g., Lenovo ThinkSystem ConnectX-7 NDR200 QSFP112 options per Lenovo Press LP1693) and BlueField-3 QSFP112 DPUs.
Software dependencies:

NVIDIA MLNX_OFED or DOCA driver stack on host endpoints
Switch firmware with the NDR200 breakout port profile enabled
Cable profile recognized via EEPROM — verify in switch CLI / mlxlink output


Reach: 3 m fixed length — passive copper, do not extend.
Power: passive assembly — no power drawn beyond EEPROM management.
Pre-deployment verification: confirm switch firmware, adapter firmware, driver versions, and breakout port configuration.

Frequently Asked Questions (FAQ)
Q. What is the Lenovo 03GX912?
The 03GX912 is a 3 m passive copper splitter cable: one twin-port OSFP end at 800Gb/s NDR aggregate breaking out to four QSFP112 ends at 200Gb/s NDR200 each, using 100G-PAM4 signaling. Lenovo lists it under option 4X97A81835 (feature code BQK3).
Q. What is the NVIDIA equivalent part number?
The NVIDIA LinkX base family is MCP7Y40-Nxxx; NVIDIA's 3 m length is MCP7Y40-N003. Lenovo-branded units ship under the Lenovo P/N — verify the exact part number on the unit label.
Q. Will the 03GX912 fit QSFP56 or QSFP-DD cages?
No. The head end is a finned-top OSFP connector and the four split ends are QSFP112. It is physically incompatible with QSFP56, QSFP28, and QSFP-DD cages.
Q. Is this cable passive or active?
Passive. There are no signal-conditioning electronics in the data path — only an identification EEPROM in each connector end. It is not an ACC and not an AOC.
Q. What hardware works with the 03GX912?
Typical head-end platforms are NVIDIA Quantum-2 switches (QM9700 / QM9790) in NDR200 breakout mode; typical endpoints are ConnectX-7 NDR200 QSFP112 adapters and BlueField-3 QSFP112 DPUs. Verify firmware and port profiles before deployment.
Q. What condition is supplied by T.E.S IT-SOLUTIONS?
Refurbished Grade A. Each unit is bench-tested where test topology is available — link verification, EEPROM check, and cosmetic inspection. EU stock, global B2B shipping.
Why T.E.S IT-SOLUTIONS
Every 03GX912 unit ships with: (1) link verification where test topology is available, (2) EEPROM / vendor data check, (3) full cosmetic inspection, (4) professional anti-static packaging, (5) global B2B shipping from EU stock, (6) technical consultation for HPC and AI fabric design at no extra cost.