I have implemented this mod and it seems to make the game feel more responsive also looked smoother while driving and in replays and loading time seemed a bit shorter, although I did not time it. CPU temp did not go any higher than normal. Performance increase was not massive but any increase is worth while, rf2 being CPU intensive every thing helps. Definitely worth a try. Link to video below.
I did not say it would give you extra FPS, that's the GPUs job unless your CPU is bottle necking the CPU is processing all the background info you don't see and that's why it probably felt more responsive and looked smoother. The CPU is reading wheel inputs, your inputs and transmitting track info to the wheel and all other info from the game all the other car positions on track and all their times and any plugins your using and every thing else to make the game run. If CPU is running better it can send the info to GPU more efficiently so the GPU is not waiting for the information to send to the screen. The GPU only produces what you see on screen from the information sent by by CPU, the better the CPU runs more efficiently the game runs.
my CPU is already monitored by my bios and my overclock settings....but thanks i feel good now with ultimate setting : ()
Just this I think, going by the title of the video, not watched it. https://www.howtogeek.com/368781/how-to-enable-ultimate-performance-power-plan-in-windows-10/