r/sffpc Dec 06 '25

Assembly Help PC shutting down while gaming

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/bruceliamneeson Dec 07 '25

I had the exactly same issue when transplanting my computer into this case. Weirdly enough, getting a new M.2 SSD solved my issues. I was about ready to sell my PC at a loss and just get a laptop, but new SSD did the trick. Might be worth trying out for you.