I've recently built a new PC with a Ryzen 5 7600X, and I've been facing some overheating issues when under load, reaching temperatures of around 90°C. To tackle this, I decided to undervolt the CPU using Precision Boost Overdrive (PBO). Initially, I set an aggressive -30 curve optimizer magnitude, which surprisingly allowed my system to boot into Linux Mint without any problems. It even passed a 50-minute stress test with flying colors, dropping temperatures by about 20°C without any noticeable reduction in clock speed. However, now my PC is randomly restarting every few hours while I'm just doing normal tasks that aren't intensive at all. I'm puzzled because it seems to be linked to the undervolting process, but why does it crash during light use when it can handle a stress test?
2 Answers
It sounds like your undervolting settings might not be stable enough. You might want to dial back the undervolt a bit. It’s common for a CPU to pass stress tests but still be unstable for light tasks if the voltage is too low. Try increasing the voltage incrementally until the restarts stop.
Yeah, that can happen! Sometimes, CPUs will handle heavy loads better than lighter tasks if the undervolt is just at the edge of stability. Just keep tweaking the settings; you'll find the sweet spot where it runs cooler without crashing. It just takes some patience!

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