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