I think I have the same issue. When I set my pump profile to be the Hydro X Pump settings, I think either the pump is moving very slow or not at all since the flow indicator on the GPU is not moving. Instead, I had to add my own profile to adjust the RPM and had to set it to 90% and above in order to move the flow meter. I'm not sure if this is how it's supposed to work since it's my first time doing custom water cooling. My 3900x is also hitting 90C when I run realbench stress test :/ Seems a bit high for a custom loop with 2 rads.