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RTX 3090 'GPU fallen off bus' error fixed by cleaning PCIe riser dust

A user on the r/LocalLLaMA subreddit shared a solution for a persistent "GPU has fallen off the bus" error (Xid 79) on an RTX 3090. After extensive software troubleshooting failed, the user discovered that dust in the PCIe riser connection was the culprit. Cleaning the connection with a brush and isopropyl alcohol resolved the issue, restoring GPU stability under load. AI

RANK_REASON User-generated troubleshooting tip for a hardware issue, not a significant industry event.

Read on r/LocalLLaMA →

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  1. r/LocalLLaMA TIER_1 English(EN) · /u/Swimming_Beginning24 ·

    RTX 3090, Xid 79: 'GPU has fallen off the bus' fixed by cleaning dust out of PCIe riser

    <!-- SC_OFF --><div class="md"><p>Hopefully my experience helps out someone else:<br /> I bought a used prebuilt RTX 3090 system (ROG Strix GA35 G35DX) from Facebook Marketplace recently. My intention was to use it for local ML. Unfortunately, under load the GPU kept disconnectin…