I have the same MSI Z690 Pro-A motherboard. Are you trying an undervolt?

I found with the latest MSI bios I don’t need to touch the LLC setting, just lite load in advanced CPU configuration.

Change it to manual, set AC loadline to 50 to start with, DC loadline to 110-120, then play around with negative offset voltage.

Then change the AC loadline by -10 / +10 until it is stable. Higher AC loadline = higher offset can be applied without too low vdroop, I ended up needing 60 AC LL on my chip for it to not droop to 1.225v or less, so now the voltage curve is 1.25-1.38 with some negative offset applied, and 325 PL stays under 99c in cinebench.

On an MSI board make sure you’re using Auto or Adaptive and not Fixed.

LLC 4-7 work best to let the voltage drop under load. LLC 1-3 are best if you’re running a heavy overclock and need the top of your voltage limit to keep it stable.
If that doesn’t work reflash BIOS or load optimized defaults and start over with your settings.
Track VCORE with HWiNFO64 after applying a setting in BIOS. Run a benchmark and track the voltage under load.

In part that’s because LLC is to compensate for Vdroop caused by weak phases relative to load, but stronger VRMs have less Vdroop potential, so LLC has less of an effect.