An interesting guide, I leave link for my own preference. May be useful to someone. I am surprised and ashamed I never came across it before.
One drive link:
https://onedrive.live.com/?authkey=%21AJyeTw3RV0ZXoR8&cid=4D10C7FFE477F2D1&id=4D10C7FFE477F2D1%21391&parId=4D10C7FFE477F2D1%21387&o=OneUp
Source: https://www.reddit.com/r/starcraft/comments/6tisvd/starcraft_ii_performancelow_fps_troubleshooting/
FPS problems, low FPS, troubleshooting, performance, technical support, fix.