this post was submitted on 23 Jun 2023
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Try upping your cooling and keeping both the CPU and GPU a bit cooler than 80C.
Ok, thanks for the suggestion, I'll look into it.
I would imagine that the CPU/GPU are getting too hot, which then in turn is overheating your PSU over the next 10-20 minutes, and then the PSU can't supply stable power, causing a crash. When you lower graphics quality, the 4090 puts out a fraction of the heat, staving off this issue. That's my best guess.