Lenovo Mellanox® 03GX910 InfiniBand NDR200 OSFP to 4x QSFP112 DAC: This is a high-performance passive copper hybrid breakout cable assembly optimized for short-reach high-density interconnects. It interfaces a single 800Gb/s OSFP switch port (8x 100G PAM4) to four individual 200Gb/s QSFP112 adapter ports (2x 100G PAM4). This is a fixed-length integrated cable assembly, not a transceiver with a detachable patch cord, designed to eliminate optical transceiver latency in adjacent-rack or intra-rack compute clusters.
🔧 Technical Specifications
OEM: Lenovo 
P/N: 03GX910 (Equivalent to NVIDIA MCP7Y40-N01A / 980-9I75D-00N01A)
Data Rate: NDR200 (800Gb/s Split to 4x 200Gb/s)
Length: 1.5m (Passive Copper)
Connector A: 1x OSFP (Finned for heat dissipation)
Connector B: 4x QSFP112
Power Consumption: 0W (Passive)
🌐 Engineering Context: At 1.5 meters, this DAC provides the optimal balance between reach and signal integrity for Top-of-Rack topologies. While Active Optical Cables (AOC) are used for longer runs, this Passive DAC offers superior reliability (MTBF), zero power consumption, and "Deterministic Latency" crucial for synchronized AI training. It provides complete "EMI Immunity" due to its shielded twinaxial construction, ensuring data integrity in high-noise switching environments.
🧠 Typical Use Cases
Connecting Lenovo ThinkSystem AI Servers to OSFP Leaf Switches within the same rack.
Cost-effective fanout connectivity for NVIDIA ConnectX-7 adapters.
High-Performance Computing (HPC) nodes requiring sub-microsecond latency.
Environments restricting active component thermal output.
 
✅ Compatible With: Lenovo ThinkSystem V3 Series Servers (with ConnectX-7 QSFP112 cards) and NVIDIA Quantum-2 QM9700/QM9790 Switches. (Requires ports configured for native InfiniBand NDR operation and MSA-compliant support).
❌ NOT Compatible With: Standard 100GbE/400GbE Ethernet ports lacking 100G PAM4 lane support, Legacy QSFP56 HDR ports, or hardware requiring active signal boosting for 1.5m detection.
 
⚠️ Installation & Handling: The 1.5m length limits cable slack, requiring precise cable management. Maintain a strict bend radius of >30mm to avoid impedance mismatches. The "Hybrid" nature refers to the OSFP-to-QSFP112 transition; ensure the OSFP end is secured in the switch chassis before routing the four thinner QSFP legs to server NICs.
🌡️ Thermal Considerations: While passive, the OSFP connector utilizes a finned top surface to leverage the switch chassis airflow. Do not obstruct the intake vents of the switch port. Ensure the ambient rack temperature remains within the passive operating range (0°C to 70°C).
 
🤝 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.