Information to note when using Performance Enhancer.
With eXtended Frequency Range (XFR) version 2, there are configurable options which can increase boost frequencies and duration.
The available options are PPT, TDC and EDC under “Advanced\AMD CBS\NBIO Common Options\Precision Boost Override Configuration”.
The BIOS item “Performance Enhancer“ tunes these options in a simple way.
Level 1 and 2 rely only on the AMD provided options mentioned.
Level 3 and 4 has a few tweaks of our own (with the help from The Stilt) which causes XFR to always boost to the highest possible frequency.
When using Level 3/4, make sure to use the Balanced power profile, or adjust the “Minimum Processor State” to below 50% on your preferred profile.
Otherwise, Core Performance Boost (CPB) will not work properly and single threaded performance will suffer. Additionally there’s a grace period of roughly a minute after entering the operating system until P-states are engaged properly.
Each CPU is different and boosts to different frequencies, the same settings on two different samples will give different results.
The increased frequencies might be too high for some CPUs or require additional voltage.
When using this function, it’s best to rely on Offset Mode for the CPU Core Voltage.
Disclaimer - You will want to have a board with an adequate VRM and liquid cooling to keep thermals in check when using the higher levels because things can get a little toasty.
Disclaimer 2 - Levels 3 and 4 probably should not be run 24/7 or under long sustained load. Bad things could happen.
Level 1 & 2 are using constraints recommended by AMD for silicon reliability and life span.
Level 3 & 4 are enhanced versions by the Stilt and ASUS and is basically an overclock. From what i remember, they ignore power and current limits to achieve higher clocks.
Level 3 & 4 (4 especially) can put quite a high voltage through the chip 1.5v+ under lower core workloads which is quite bad for silicon reliability over the long term. You can of course and as others have said set a negative offset in the BIOS and see if your still stable. Although i found that while under all core load my voltages were nice, under lesser core workloads it still sat constantly at 1.45-1.49v, which i didnt like.