A user building a multi-GPU setup for local LLM inference discovered a significant performance bottleneck caused by a misconfigured PCIe slot. One of the four RTX 3090 GPUs was incorrectly placed in a slot that only supported PCIe 2.0 x4 speeds, severely limiting its bandwidth. After reconfiguring the GPUs to utilize their full PCIe capabilities, the user observed a dramatic increase in inference speeds, with Mistral 128B performance nearly doubling. AI
IMPACT Fixing hardware bottlenecks can significantly improve local LLM inference speeds and efficiency.
RANK_REASON User-generated troubleshooting guide for hardware configuration impacting LLM performance.
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