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PSU Upgrade Resolves GPU Disconnection Issues for Local LLM Users

By PulseAugur Editorial · [1 sources] ·

A user on Reddit's r/LocalLLaMA subreddit discovered that a persistent GPU disconnection issue, which they initially suspected to be related to PCIe risers, Oculink cables, or the GPU itself, was actually caused by an insufficient power supply unit (PSU). Despite using a reputable 450W PSU, the system would crash when loading AI models and passing prompts, displaying errors like "GPU has fallen off the bus device lost from bus." The problem was resolved by upgrading to a 550W PSU, suggesting that inadequate power delivery was the root cause. AI

IMPACT Ensures stable hardware configurations for running local LLMs, preventing crashes and improving user experience.

RANK_REASON User-level hardware troubleshooting advice for running local LLMs.

Read on r/LocalLLaMA →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

PSU Upgrade Resolves GPU Disconnection Issues for Local LLM Users

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User-level hardware troubleshooting advice for running local LLMs.
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High
Clearly on-topic for AI-industry coverage.
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18 days old
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Full methodology in our editorial standards.

COVERAGE [1]

  1. r/LocalLLaMA TIER_1 English(EN) · /u/El_90 ·

    Off the bus: It wasn't pcie / oculink... it was the PSU

    <!-- SC_OFF --><div class="md"><p>For weeks I've had problems with GPU constantly disconnecting and locking the OS. It would load the model fine, then crash when I passed the first prompt, and the errors always looked like:</p> <pre><code>GPU has fallen off the bus device lost fr…

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