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6800XT connected to PSU via single cable (lemmy.nz)

submitted 3 weeks ago by [email protected] to c/[email protected]

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I saw this picture while looking at overclocking guides and I wondered if I may have my power setup incorrectly. My GPU is currently connected exactly like the don't do this diagram.

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[–] [email protected] 2 points 2 weeks ago* (last edited 2 weeks ago)

I could be wrong here, but I think the common interpretation here is wrong. The risk is not that the wires overheat and cause a fire. The risk is that the card draws too much current from a single 12V power rail on your PSU, sustained for a long time, and that burns out the power rail on your PSU.

I have a 6950 XT that I used with a 850W PSU that was connected incorrectly according to the diagram, with multiple connectors coming off a single rail. After about 6 months, one day my SSD stopped working, and after some tinkering, I realized that if I plugged it into a different 12V connector, it started working! I had burned out one of the 12V rails on my power supply, and I strongly suspect it was my incorrect wiring into my 6950 XT that caused it. (edit: I got a new PSU and never looked back)