I5 9600K specifications include voltage details for various components.
I5 9600K specifications include voltage details for various components.
You're seeing 1.33V per core because the cores are maxing out their voltage limits, which is normal under heavy load. It's not unusual for high-end CPUs like the i5 9600K to hit those levels when running demanding tasks. Others might be using different settings or components that allow higher voltages, so it's worth checking your BIOS and power delivery configuration.
I enabled XMP to run RAM at 3200MHz using profile 1. To turn MCE off, you should verify the settings—your ASUS Z370 Prime II already has MCE disabled, and you mentioned it’s not increasing voltages either. Check your BIOS or power management configuration for confirmation.
voltage level depends on your board settings, similar to what @Plutosaurus mentioned—1.33v works as long as temperatures stay manageable. Once MCE is off, you can reduce it by 0.01v incrementally while keeping stability. The highest 9600k model typically needs around 1.3v to achieve 4.6ghz performance, so the "stock" voltage varies with the motherboard.