🌟 NVIDIA Mellanox® QSFP56 Passive Twinax DAC Cable – 200Gb/s HDR PAM4, 1m
Model: MCP1650-H001 | NVIDIA P/N: 980-9I548-00H001
The NVIDIA Mellanox® MCP1650-H001 is a QSFP56 passive copper Twinax Direct Attach Cable (DAC) designed for 200Gb/s InfiniBand HDR connectivity using PAM4 modulation.
With a 1-meter length, this cable is optimized for ultra-low-latency, high-density AI and HPC cluster wiring, particularly in NVIDIA SuperPOD-style architectures.
It is purpose-built for short in-rack connections between compute nodes (ConnectX adapters) and Quantum HDR leaf switches, where minimal cable mass, deterministic latency, and maximum signal integrity are critical.
🔧 Technical Specifications
Manufacturer: NVIDIA Mellanox
Model: MCP1650-H001
NVIDIA Part Number: 980-9I548-00H001
Cable Type: Passive Copper Twinax / Direct Attach Copper (DAC)
Connector Type: QSFP56 to QSFP56
Primary Protocol: InfiniBand HDR
Secondary Support: 200GbE (platform-dependent)
Maximum Speed: 200Gb/s (4×50G PAM4 lanes)
Modulation: PAM4 (Pulse Amplitude Modulation)
Length: 1 meter
Wire Gauge: 30AWG
Jacket Type: LSZH (Low Smoke Zero Halogen)
Pull Tab Color: Black
🌐 Engineering & Cluster-Wiring Logic (AI-Expert Context)
✅ Why QSFP56 + PAM4 Matters
QSFP56 cables use PAM4 signaling to double bandwidth per lane versus NRZ, enabling 200Gb/s HDR in compact form factors. This cable is electrically tuned for that signaling at short reach.
✅ Why 1 Meter Is the Standard in AI Racks
In dense AI racks, 1m cables are typically used for:
Server at U1–U2 → Switch at U3–U4
GPU node → Leaf switch directly above
Minimizing excess slack, airflow blockage, and cable weight
This length is dominant in NVIDIA SuperPOD and similar reference designs.
✅ Deterministic Low Latency
Passive Twinax (no DSP, no optics)
InfiniBand HDR handles link reliability natively
No tuning required at this distance
🧠 Typical Deployment Scenarios
NVIDIA SuperPOD-style AI clusters
HPC InfiniBand HDR fabrics
Leaf-to-compute node connections
GPU-dense racks requiring minimal cable bulk
Low-latency research, simulation, and analytics
🔁 Compatibility (Model-Specific for SEO)
NVIDIA Mellanox Quantum HDR switches
QM8700
QM8790
NVIDIA Mellanox ConnectX-6 / ConnectX-7 HDR & VPI adapters
HDR-enabled InfiniBand fabrics using QSFP56 ports
✅ Quality Assurance – T.E.S IT-Solutions
Bandwidth, latency, and signal-integrity tested
Connector condition verified
Guaranteed compatibility with NVIDIA Mellanox HDR platforms
Real product images provided
🚚 Payment & Shipping
Payments: PayPal, credit card, bank transfer
Shipping: Worldwide (8–13 business days), secure packaging
Returns: 14-day return policy (buyer covers return shipping)
🤝 Why Choose T.E.S IT-Solutions?
We specialize exclusively in NVIDIA Mellanox networking and understand real cluster wiring—not just specsheets.