NVIDIA Mellanox® MCP7900-X01AA — Passive Copper DAC Cable

Specifications

OEM: NVIDIA Mellanox
Part Number (MPN): MCP7900-X01AA
Category: Passive Copper DAC Cable
Connectors: 1 × QSFP+ → 2 × SFP+
Speed: 40GbE
Cable Length: 1.5m
Type: Splitter / Breakout Cable
Condition: New, factory-sealed


Identity
The NVIDIA Mellanox® MCP7900-X01AA is a QSFP+ 40GbE 1.5m Passive Copper DAC Cable. This is a splitter / breakout cable assembly. New, factory-sealed by T.E.S IT-SOLUTIONS.

What This Is NOT

NOT an AOC. Passive copper cable with limited reach (typically ≤7m for high-speed gens).
NOT a transceiver. Fixed-length cable assembly; ends are not field-replaceable.
NOT a 1-to-1 cable. This is a splitter/breakout — both endpoints on the split side must accept the lower-speed downstream connector.
NOT bundled with adapters or transceivers — sold standalone.


Capabilities & Features

Passive copper twin-axial pairs — no power required, lowest latency.
DDM (Digital Diagnostic Monitoring) — temperature, voltage, optical power readable via I²C.
EEPROM on each end with product identification and operating data.
Hot-pluggable into any matching QSFP/SFP cage.


Compatibility & Constraints

Primary connector: QSFP+ (compliant with MSA cage spec).
Downstream connectors: 2 × SFP+ on the split side.
Reach: 1.5m fixed length.
Speed: 40GbE.
Compatible adapters: ConnectX-3 Pro / ConnectX-4 / ConnectX-5.
Compatible switches: NVIDIA Spectrum / SwitchX-2.
Power: drawn from host port (no external supply required).


Deployment & Use Cases

Top-of-Rack to server interconnect.
HPC compute node fabric.
AI training cluster east-west bandwidth.
Fan-out: one switch port serves two lower-speed endpoints.


Frequently Asked Questions (FAQ)
Q. What is the MCP7900-X01AA?
The MCP7900-X01AA is a 1.5m passive copper breakout cable: one QSFP+ head at 40GbE breaks out into four SFP+ legs.
Q. Does the switch need special configuration?
Yes. The head port must be configured for 4x10GbE breakout mode.
Q. Will T.E.S IT-SOLUTIONS confirm the configuration of MCP7900-X01AA before shipping?
Yes. T.E.S IT-SOLUTIONS (tes-itsolutions.com) inspects each unit and verifies vendor markings before dispatch from EU stock.

Why T.E.S IT-SOLUTIONS
Every unit is bench-tested by T.E.S IT-SOLUTIONS: link establishment, port-by-port traffic validation, and full cosmetic inspection. Professional anti-static packaging, global B2B shipping from EU stock, and technical consultation for HPC / AI cluster deployments.