The overclock issue encountered
The overclock issue encountered
You're facing some tricky settings with your MSI B450 Tomahawk. It seems the issue lies in finding the right loadline calibration. The list you mentioned has several options, but it's important to note that the auto setting Vcore will default to 1.35. You might want to lower it if needed. You've tried auto-setting from 1.1 up to 1.25, but the stress test failed after a while. The screenshots below might help clarify what you're looking for. Just let me know what level you think would work best for stability.
Locate the configurations that minimize voltage drop from idle to full load (avoid those with overshoot), then move one level lower (voltage drop increases slightly).
This means you need real testing. With MSI, the lower value (level 1) should result in less compensation, leading to a greater drop, while the higher value (level 7) would have more compensation.
You're asking about adjusting drop settings and testing them, especially since you're new to this. It's good to start simple and experiment carefully.