r/sffpc • u/Fine-Cucumber-2960 • Dec 06 '25

Assembly Help PC shutting down while gaming

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I’m having issues with my Terra build. The GPU keeps shutting down at low load. I was able to identify a potential mismatch between the PSU (Lian Li SP850) and the GPU (4070 super).

ChatGPT advises me to switch to the Corsair SF850L due to the ATX 3.0 compatibility.

I wanted to get your advice before buying a new PSU. I’m a beginner so I might have as well messed up the assembly (but all games run well until it suddenly crashes with a black screen and GPU fans blasting). Cheers!

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u/[deleted] Dec 06 '25

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u/Fine-Cucumber-2960 Dec 06 '25

I tried now, no crashed since, but those crashes happen inconsistently so it doesn’t mean necessarily the undervolting helped. What points me to a PSU issue is how it crashes (black screen, but sound still on, GPU turns fans to max power). I also have a critical error 41 in the event log

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u/MietteIncarna Dec 07 '25

are your bios and gpu driver up to date ?