Hi there everyone! So, fast-forward on time, and today I stumbled upon a video from a guy who really knows windows computers and uses them for music production as I do, and he addressed the issue and actually found a solution that worked for me. The one that solved the issue is the second one he tries. I'll leave you the link down below. Now I can call this SOLVED! Hope this helps. Bye! Windows Tweaks for Music Production - May update 2004 and 20H2 - YouTube 
Hi, I have the xeon version which came with the windows 10 for workstation version, now 21H2 19044.1566 compilation, and I can't get to the minimum processor state. After following some regedit suggestions from the windows forum I was able to see the Maximum state, but still no minimum. I bought this computer for audio and I'm getting some glitches that shouldn't be happening with the configuration I have, so my best guess is that it's related to this issue, since I can only see the Balanced power plan and with very limited advanced options. I've contacted dell support but their answer is that, since I have the basic warranty they can't help me. I found this extremely annoying. My old XPS L502X have this right where they're supposed to be.  It'll be great if someone has a solution to this. Precision specifically solutions are not very common on the web. Regards      
Precision 5760 power plans missing