HPE S4A90C NVIDIA 2-WAY NVLINK Bridge FOR H200

HPE S4A90C NVIDIA 2-Way NVLink Bridge for H200

Overview

The HPE S4A90C is a 2-way NVLink bridge designed to connect a pair of NVIDIA H200 GPUs, enabling direct high-bandwidth GPU-to-GPU communication that bypasses the PCIe fabric entirely. In AI training and HPC workloads where inter-GPU bandwidth is the throughput bottleneck, NVLink interconnects are the architecture of choice — and the S4A90C is the HPE-sourced bridge component that makes that possible in HPE server platforms supporting H200 installations.

Weighing just 0.97 lb, the S4A90C is a compact passive bridge connector. It ships factory-new and genuine — no grey-market, no parallel imports — which matters when you are building or expanding a high-density GPU compute platform where counterfeit or refurbished interconnects introduce reliability risk at the worst possible point in the data path.

Key Features

• 2-Way NVLink Connectivity: Bridges two H200 GPUs for direct peer-to-peer memory access and data transfer, removing PCIe as the bottleneck on tightly coupled workloads like large language model training and inference.
• H200-Specific Fit: Designed and sourced specifically for NVIDIA H200 GPU pairs — not a universal bridge. Verify your server platform and GPU slot configuration before ordering to confirm physical and electrical compatibility.
• Compact Form Factor: At 0.97 lb, the bridge adds negligible weight to the GPU assembly. Relevant for dense multi-GPU rack server builds where component clearance and airflow paths are already constrained.
• HPE Channel-Direct Sourcing: Procured through HPE's distribution channel — genuine component, not a third-party substitute. Correct for HPE warranty compliance and service contract alignment.

Integration and Compatibility

The S4A90C is intended for HPE server platforms configured with NVIDIA H200 GPUs in a 2-way NVLink topology. Before deploying, confirm the target server's GPU cage and NVLink slot spacing match the H200 bridge form factor. Consult your HPE options and accessories documentation or HPE QuickSpecs for the specific server model to validate mechanical fit. This bridge does not apply to H100, A100, or other GPU generations — NVLink bridge form factors are generation-specific.

Frequently Asked Questions

Q: What GPUs is the S4A90C compatible with?

A: The S4A90C is a 2-way NVLink bridge for NVIDIA H200 GPUs. It is not interchangeable with bridges designed for H100, A100, or earlier NVIDIA GPU generations.

Q: How much does the S4A90C weigh?

A: 0.97 lb. This is the shipping/component weight per the HPE distribution record.

Q: Is the S4A90C a passive component?

A: Based on its product classification as a NVLink bridge connector, it is a passive interconnect — it requires no independent power input beyond what the GPU pair provides. Verify in HPE QuickSpecs for your specific server platform.

Q: Where is the S4A90C manufactured?

A: Country of origin is China (CN) per the HPE distribution record.

Ted Perry

The S4A90C is a single-purpose component — a 2-way NVLink bridge for H200 GPU pairs — and its 0.97 lb weight tells you most of what you need to know about the physical footprint you are adding to a dense GPU node. Where I see this part specified most often is in HPE ProLiant or Cray-based AI training builds where the customer is standing up H200 pairs and needs the HPE-sourced bridge to maintain platform warranty and service alignment rather than sourcing a third-party equivalent.

Technical Highlights:

• NVLink 2-Way Topology: Connects two H200 GPUs for direct peer memory access — removes PCIe as the inter-GPU bottleneck on LLM training and inference workloads where weight-update synchronization is latency-sensitive.
• H200-Generation Specific: NVLink bridge form factors are not cross-generational. The S4A90C is sized and keyed for H200; do not substitute with H100 or A100 bridges even if they appear physically similar.
• Compact at 0.97 lb: In a multi-GPU chassis already managing airflow for 400W+ TDP cards, a sub-1 lb passive bridge is the correct answer — no added thermal or power design complexity.

Deployment Considerations:

• Verify mechanical fit against HPE QuickSpecs for your specific server model before procurement — GPU slot pitch and NVLink connector spacing vary across ProLiant and Apollo platforms.
• Spec data for this SKU is limited in public distribution records; for bandwidth figures, supported topologies, and thermal clearance requirements, pull the HPE QuickSpecs document for the target server platform directly from HPE's portal.

The S4A90C belongs in HPE H200-based AI training nodes where platform integrity and service contract alignment are non-negotiable — not as a standalone upgrade path for non-HPE systems.