Tuning UEFI Settings for
Performance and Energy
Efficiency on AMD Processor

https://metebalci.com/blog/epyc-energy-consumption-test/


In order to have maximum power saving and efficiency, I am using the following BIOS options:

   APBDIS = 0: dynamically switch Infinity Fabric P-state based on link use
   DF C-States = Enabled: allow Infinity Fabric to go to low-power
   Global C-State Control = Auto: enables C2 state
   cTDP and Package Power Limit Control = Auto: default power limits
   Core Performance Boost = Auto: enables boost frequency when possible

Particularly the first two options, maybe also the third one, can diminish the performance under load, so they are usually recommended to have opposite values (APBDIS=1, DF C-States=Disabled, Global C-State Control=Disabled) for performance oriented setups.