Quote Originally Posted by Repliquant67 View Post
Edit 3 : I think this is because I have only two metal o-ring with hole and I need one without for the junction between the two blocks. The liquid don't spread properly and pass more by the ram block who's less restrictiv.
Sorry, I don't understand what you're saying. Please provide pictures if you can. Did you install barbs at each "end" of the water channel on the waterblock? Or accidentally installed at the same "end" of the water channel, on opposite sides of the block?

If so, that would explain your temps....