What is the primary use of the Lenovo 03GX912 cable?

The Lenovo 03GX912 is an InfiniBand splitter cable used to connect one 800Gb/s OSFP switch port to four separate 200Gb/s (NDR200) servers or nodes, typically within the same rack.

Does this cable work with non-Lenovo equipment?

Yes, while branded Lenovo, this cable is based on NVIDIA/Mellanox MSA standards (equivalent to MCP7Y40-N003) and is generally compatible with any MSA-compliant NVIDIA Quantum-2 infrastructure.

Is this cable Active or Passive?

This is a Passive Copper Cable (DAC). It consumes no power and has no active electronics, offering the lowest possible latency for high-performance computing.

Lenovo Mellanox® 03GX912 InfiniBand NDR200 OSFP to 4x QSFP112 DAC: This is a high-performance passive copper breakout cable assembly designed for next-generation AI and HPC clusters utilizing the NVIDIA Quantum-2 architecture. It serves as a splitter to connect a single 800Gb/s OSFP switch port (8x 100G PAM4 lanes) to four individual 200Gb/s QSFP112 compute endpoints (2x 100G PAM4 lanes each). This is a fixed-length integrated cable assembly, not a transceiver with a detachable patch cord, ensuring minimized insertion loss and optimal signal integrity.

🔧 Technical Specifications

OEM: Lenovo
P/N: 03GX912 (Cross-compatible: MCP7Y40-N003)
Data Rate: NDR200 (800Gb/s Fanout to 4x 200Gb/s)
Connector A: 1x OSFP (Octal Small Form-factor Pluggable)
Connector B: 4x QSFP112 (Quad Small Form-factor Pluggable 112)
Power Consumption: 0W (Passive Device)

🌐 Engineering Context: This Direct Attach Copper (DAC) solution is critical for minimizing latency in Top-of-Rack (ToR) supercomputing fabrics. Compared to equivalent copper solutions or active optical alternatives, this passive cable offers lower weight, tighter bend radius, and superior long-term signal stability without the thermal overhead of lasers. It provides Deterministic Latency and complete EMI Immunity, making it the preferred physical medium for synchronized AI training workloads.

🧠 Typical Use Cases

Connecting Lenovo ThinkSystem Servers (ConnectX-7) to Quantum-2 Switches.
High-Frequency Trading (HFT) environments requiring nanosecond-level precision.
AI Model Training clusters (LLM/GenAI) using InfiniBand NDR protocols.
Short-reach (3m) intra-rack fabric aggregation.

✅ Compatible With: Lenovo ThinkSystem Servers equipped with NVIDIA ConnectX-7 adapters (QSFP112) and NVIDIA Quantum-2 InfiniBand Switches (OSFP). (Requires ports configured for native InfiniBand NDR operation and MSA-compliant support).

❌ NOT Compatible With: Standard 10G/25G Ethernet SFP ports, Legacy QSFP28 (100G) ports lacking 112G SerDes support, or OSFP ports configured strictly for 800G non-split operation.

⚠️ Installation & Handling: At 3 meters, the cable gauge (typically 26AWG) results in a thicker, stiffer jacket. Installers must adhere to a minimum bend radius of 35-40mm to prevent twinax wire deformation or impedance drops. Support the cable weight near the OSFP interface to prevent connector sag.

🌡️ Thermal Management: Passive DACs do not generate heat; however, their physical bulk at the switch interface can impede airflow. Ensure Lenovo rack cooling profiles are adjusted to High-Performance mode to maintain airflow through the switch faceplate.

🤝 Why Choose T.E.S IT-SOLUTIONS? We specialize in enterprise-grade Lenovo and NVIDIA networking solutions. Every unit is strictly validated for InfiniBand NDR200 performance in our lab. We offer expert consultation, fast worldwide shipping, and a comprehensive warranty to ensure your data center infrastructure runs without compromise.

LENOVO Mellanox® 03GX912 OSFP→4x200G QSFP112 NDR200 Fanout DAC 3m

Name: LENOVO Mellanox® 03GX912 OSFP→4x200G QSFP112 NDR200 Fanout DAC 3m
SKU: 03GX912_NEW

SKU: 03GX912_NEW

€1,350.00

Quantity