I don't think lack of radiator is the problem, your gpu temps are still low. If radiator was your problem, then they would get warmer than 42C.
Yeah, i had the same thoughts but did not want to jump to conclusion since i'm new to WC.
Did you check the plate inside the waterblock, like waza mentioned on the previous page?
Check the water block as I've seen folks post about it. The plates were found in the wrong position in other cases, even missing in one instance.
I checked the plate yesterday when i change the TIM and it's in place just like the pic that Waza posted.
Make sure you're using the inlet on your block and not the outlet. CPUs are very sensative as you're pushing the warm flow to the CPU from the GPU's. I am sure your temps would drop some if you had the CPU first in line and than the GPUs. If you do decide for the hell of it to add more heat surface, add more than 120 if you're going to hang something outside.
I just have to wait and see. Might even remount the CPU block a 5th time
From res/pump to the first GPU -> second GPU -> IN at the block -> rad -> res/pump
That's how the loop looks like.
You never told us what RPM your fans were. Have you benchmarked at different fan speeds to see which gives you the optimal performance?
The rad fans 6x140mm Yate Loon - D14SL-12 are running at max "1000rpm" and the pump is still on max since i bleeded the loop.
Also, I've noticed your tubing is already starting to cloud. What liquid and biocide are you using?
I bought MasterKleer tubing and they where slightly tinten when i recieved it, and all review, how to and guide iv'e read says the same thing about MasterKleer, (turns opaque fairly quickly)
That said. I run my loop just with distilled water + a additive "a no name brand" similar to Feser Base.
Before that i cleaned my loop with distilled water and
Cleaning Agent Sysclean HPD
But yesterday i noticed that my water has turned slightly blue/black. Don't know why, so i should maybe change the water even if it just been there for some days.