I use this for:
- Shutdown all the not needed processes like all those Steam extras, unexpected virus scanning activity, windows store, web browser, win update and the not needed Svchost.exe.
- Give priority to the game itself and lower or even idle other not important ones.
- Make selected cores exclusively for AC only (affinity)
you have to test it if it is useful in your rig, could be it’s not effective like in Win11 there seems to be a affinity ruler been introduced.

Or complete unnecessary if running a topdog like a AMD 7800X3D
My 2019 i9-9900KS 5,2Ghz OC, 50% of the total 8cores+8HT are now exclusive for AC and I do see a lowering of max load per core.
Also the CPU Frame times on my PC shows not that impressive improving, but it’s more consistent and personally i think in VR, lowering fluctuations is more important than a high FPS. In other words I prefer 60fps straight more then 90fps but also fluctuating. Now on the other hand if you see one or two cores is sometimes reaching 90% (be aware you can not detect the quick100% peaks) think this is the solution to reduce.
Note: Later I will publish here some other free software so you have a choice.
Edit: Free ones I have used or did try out:
https://www.d7xtech.com/daffinity/ No shutdown function
https://bitsum.com/ Bit to complex and high load on your CPU.
https://www.bill2-software.com/processmanager/download-en.shtml my preferred one because it’s simple.
https://systemexplorer.net/ never used it only a few try outs, but it is working.
http://www.koma-code.de/ “CPU-control” simple but old, only for 4 core CPU.