Multi-GPU Local LLM Scaling Hits Reliability Wall

The hottest take is that multi-GPU local LLM scaling is mostly an observability and systems-integration problem, not a pure hardware problem.

• –The most repeated pain points are non-obvious failures: dropped PCIe links, GPU imbalance, and scheduler or graph issues that waste throughput.
• –ROCm and driver/tooling instability still shows up as a trust problem, especially once there are enough GPUs that one weak link ruins the whole box.
• –Power and thermals matter, but the bigger frustration is when everything looks healthy and utilization still falls off a cliff.
• –This is clearly infrastructure-oriented discussion, not a product launch, so the real value is in surfacing operational pain rather than a new tool.