The lines with the RegistryDwords are the lines for the PowerMizer. PowerMizerEnable=0x1 = to switch it on or off (using hex codes) PerfLevelSrc=0x2222 = is the performance strategy where 22 is the code for fixed frequency and 33 for adaptive frequency, defined for battery and AC use. PowerMizerDefault=0x3 = is the code to enable a performance level for battery use from 1 to 3, being from high (1) to low (3) performance. PowerMizerDefault=0x3 = same as above but for AC power.
The only issue is that you cannot change these values on the fly because there is no tool.
So you have to play with different xorg files and shellscript that bring your system to runlevel 3, rename some xorg files to the one you want, unload and reload the kernel module and switch the system back to runlevel 5.
With a script this only takes about 5 seconds.
As long as it works I’ll take that for granted
At least 3D is still working fine but a bit less performant, but who needs 600Mhz for wobbly windows and a desktop cube