I tend to not duplicate priors. Pick over https://www.google.com/search?q=slow+after+installing+new+CPU+site:www.tomshardware.com
Also let's see that Web Speccy report. How is at https://www.piriform.com/docs/speccy/using-speccy/publishing-a-speccy-profile-to-the-web
TLDR; New CPU. Great fps/performance, but characters run slow/move sluggish.
Upgraded from an AMD FX-4100 to an AMD FX-8350, and seemed to have no issues regarding boot-up. However, I wanted to test the new performance of my pc, and everything runs better than expected in terms of fps/performance (no frame drops/stutter), but in shooter games (like PUBG, Killing Floor 2, etc). that give you the option to sprint, my character runs/sprints much slower than before. This isn't due to some patch/update on the game's part, because the people I play with all run at the same speed. Tested by having little races from "Checkpoint A" to "Checkpoint B". It only became an issue after I installed the new CPU, and I have rebooted my comp a few times already.
NVidia GeForce GTX 970
Gigabyte MoBo, don't remember full name