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Auto fan 511

Hello Rig, I have a TB 250 Biostar motherboard and 7 580 Safernitroplus cards. Every few days I have an error with Autofen 511. All cables, sockets, connections were tightened, the riser was checked, but the problem was not solved, please help.

511 error is a power delivery error. It’s usually from a loose or faulty (burnt/broken) power cable, but could be a hardware issue with the power circuitry on the gpu itself as well. If you have known good spare pcie power cables/risers it’s worth swapping them out, or even testing a separate psu isn’t a bad idea either.