Curious on the Temp in the CPU. When I did this loop back in my 900D, the flow was so poor into the CPU.
I would have expected things to be normalised or equal throughout, but I even saw that the majority of the coolant was flowing back out of the second GPU and down again towards the end of the loop aka the res. There was very little water moving up to the CPU.
It almost behaved like the CPU had a blockage which I had checked.