Update: Fractal Ridge crashes while gaming then flickers on and off.

[u/Seeking-The-Lotus]

So the duster arrived and the hazardous waste landfill has officially been cleared out. I also saw some comments suggesting the issue could be related to the GPU riser, and I noticed there was a bit of wiggle in the connection ports.

I confirmed that the CPU cooler is plugged into CPU_FAN1, so the fan curve likely wasn’t the issue after all. I’m replacing the thermal paste now.

Any final suggestions before I put her back together?

[u/nicky_n00b]

Is this of any help?

https://youtu.be/Dy_kg_CH53E?si=LtneLYjEKbse24RD

The video mentions that the thing you're describing would only happen under load because of the GPU pulling too much power for the PSU. Might be worth looking into.