Shamino’s Ryzen LoopFmax is a small tool that lets you automatically decrease the configured Precision Boost 2 Fmax limit.

I use this tool to build the V/F curves of Ryzen CPUs which I often show in my Ryzen SkatterBencher overclocking guides. Here you can read the typical process.

The LoopFmax tool allows you to configure three parameters:

• Start Fmax: the starting maximum frequency. This can be defined up to the default Fmax plus 200 MHz.
• End Fmax: the ending minimum frequency. This can be defined up to the default Fmax minus 1000 MHz.
• Period: define the interval period in seconds

I typically use intervals of 10 seconds as it’s a good tradeoff between gathering sufficient data points and the duration of the data gathering.

LoopFmax Download

The Shamino Ryzen LoopFmax software is available on Github.

Disclaimer

This software is provided as is and does not come with any warranties. Use at your own risk. No effort has been made to validate the functionality across all Ryzen CPUs and compatible motherboards.