Guys
PROBLEM SOLVED
Finally! I wish to thank you all for your advices and patience. Today I took out the cpu block, opened a cleaned all the gunk which was inside and IT WAS A LOT .
Now my temps are perfectly fine and waterflow is lightning fast as ever. Even GPU temps improved slightly. Now on Cinebench I do maximun 79 degrees on a couple of core while the rest from 69/75, INCREDIBLE! An improvement of almost 30 degrees while the GPU improved of 2/3 degrees at medium/high load and also the pump has become even quieter using it at full speed. WOW
I've been such an ass not cleaning the cpu block during the transfer, cause of my lack of experience I really understimated an issue like this, now everything is fantastic, thank you, thank you so much to all of you