NVIDIA QSFP112 Passive DAC Cable for DGX Spark Stacking

Description Unlock the true potential of multi-node artificial intelligence development with the official NVIDIA QSFP112 400G Passive Direct Attach Copper (DAC) Cable. Engineered specifically for high-speed NVIDIA DGX Spark(TM) Stacking, this high-performance interconnect allows developers, researchers, and data scientists to directly bridge two DGX Spark systems without the added latency or expense of an external network switch. By linking the integrated ConnectX-7 high-throughput interfaces, this cable seamlessly scales your hardware footprint into a unified, distributed powerhouse-expanding local processing capacity to handle massive AI models up to 405 billion parameters. Constructed using premium 30AWG high-speed twinaxial copper wire, the Q112-400G-CU0-5 assembly features 4 independent transmitting and 4 receiving channels operating at a blazing 100 Gbps per channel utilizing advanced PAM-4 modulation. This delivers an aggregate bidirectional fabric throughput of up to 400Gbps (running at 200GbE line-rate natively on the Spark network stack). Designed for optimal signal integrity at ultra-short distances, its passive architecture draws near-zero electrical power and generates no additional heat, maintaining a perfectly stabilized thermal environment at your desk. Fully compliant with rigorous IEEE 802.3ck, InfiniBand NDR, and CMIS management standards, this enterprise-grade stacking cable features a heavy-duty zinc die-cast shell with 360-degree EMI shielding to completely eliminate cross-talk and electromagnetic radiation. The integrated pull-tab ensures fluid, secure hot-plug installation within crowded workspace arrangements. Factory tested and hard-coded for instant hardware recognition within the native NVIDIA DGX(TM) OS environment, it provides the low-latency pipe essential for flawless pipeline and tensor parallelism across your clustered AI architecture. Specifications Technical Parameter Details Brand / Manufacturer NVIDIA Corporation Model / MPN Q112-400G-CU0-5 Cable Type Passive Direct Attach Copper (DAC) Twinaxial Cable Assembly Primary Application NVIDIA DGX Spark(TM) Cluster / Dual-Unit System Stacking Interconnect Connector Type QSFP112 to QSFP112 (Quad Small Form-factor Pluggable 112) Maximum Data Rate Up to 400 Gbps Aggregate (4x 100G PAM-4 Channels) Physical Length 0.5 Meters (1.64 feet) Wire Gauge 30 AWG Conductor Sizes Hardware Compatibility NVIDIA ConnectX-7 SmartNICs & DGX Spark Platforms Software Stack Support Native plug-and-play validation on NVIDIA DGX(TM) OS / NVIDIA NIM Impedance 100 +/-5 Ohms Differential Standards Compliance IEEE 802.3ck (400GBase-CR4), InfiniBand NDR, SFF-8661, SFF-8679, CMIS 5.0, RoHS Power Consumption Near-Zero Power Consumption (Passive Design) Ejection Mechanism High-durability Pull-Tab for easy extraction Operating Temperature 0oC to 70oC (Standard Case Operating Range) Shielding / Safety 360o Zinc Die-cast EMI Enclosure, Low Smoke Zero Halogen (LSZH) compliant options