NVIDIA Mellanox® MCP7904-X002A — Passive Copper DAC Cable
Specifications
- OEM: NVIDIA Mellanox
- Part Number (MPN): MCP7904-X002A
- Category: Passive Copper DAC Cable
- Connectors: 1 × QSFP → 4 × SFP+
- Speed: 40GbE
- Cable Length: 2m
- Type: Splitter / Breakout Cable
- Type: Hybrid Cable
- Condition: Refurbished Grade A — bench-tested by T.E.S IT-SOLUTIONS
Identity
The NVIDIA Mellanox® MCP7904-X002A is a QSFP 40GbE 2m Passive Copper DAC Cable. This is a splitter / breakout cable assembly. Refurbished Grade A — bench-tested in both link and signal-integrity checks 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 — every endpoint 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.
- 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: 4 × SFP+ on the split side.
- Reach: 2m 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 four lower-speed endpoints.
Frequently Asked Questions (FAQ)
Q. What is the MCP7904-X002A?
The MCP7904-X002A is a 2m passive copper breakout cable: one QSFP head at 40GbE breaks out into four SFP+ legs at 10GbE each.
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 MCP7904-X002A 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.
