I wouldn't say my temps were terrific to start, but
they weren't this bad neither.
The nickel plating hasn't come of. The whole thing still looks prestine.
The HydroX series blocks are all clear and I don't see any obstructions.
I have noticed the "flow indicator" of the 5700xt block is stuck, but
like you said, the CPU and GPU aren't really high TDP parts.
That said, I just ran a stress test with the pump and fans at full speed.
pump ~3400 RPM
fans ~1800 RPM
Ambient temp 24C
Loop temp 36C @ idle
CPU 50C @ idle
GPU 40C @ idle
CPU 70C @ 100% load
GPU 74C @ 100% load
Using Ryzen Master CPU stress and Heaven Benchmark simultaneously.
I think I'll have to chalk it up to inefficient static pressure fans.
The temperatures steadily increase as the stressing progresses.
I don't have the patience to wait half an hour for the loop to equalize.
Also, the HD120 fans are pretty loud at full speed. Almost annoying, in fact.
I guess I'll have to take it all apart, reapply thermal paste and replace water.