3900x steadily increasing causes stock fans to become very loud.
3900x steadily increasing causes stock fans to become very loud.
The likelihood of a faulty sensor affecting the CPU or motherboard is moderate. The inconsistent readings—only one temperature per core—could indicate sensor conflicts or data mismatches. Checking hardware monitors and other monitoring tools may help clarify if the issue lies with the sensors themselves.
I've noticed some users mentioning fluctuations in the idle temperature of Zen 2 processors. It might be related to background processes like antivirus software. With your setup—3900X and Gigabyte motherboard—I’ve seen RyzenMaster show consistent boosts to 4GHz cores. The temperatures stay steady around 32-33°C, without any sudden jumps. Even with a 280mm radiator, it seems the stock cooler isn't managing minor heat spikes well.
I figured out what might be triggering the CPU to increase its speed during idle or while streaming. It seems the power plan on AMD could be causing the issue, or a setting within that plan might be responsible. I switched the PC to Windows Power Saver and the CPU clock was reduced to 2.2GHz—this helped quiet things down while downloading games. Maybe reinstalling the AMD power plans could resolve the problem. Just don’t expect it to run above 4GHz while you’re watching YouTube. If anyone else has suggestions or experiences, feel free to share. I’m still getting used to these hardware adjustments from my old 4670K on Z87.