exactly this most specially the RBG Fans do not have fan headers, therefore only controllable by the RGB remote but you cannot select RPM fan control. You can however monitor the water coolant temp by adding a monitor i use the BarrowCH, i have this added straight from the CPU before heading to the Radiator, therefore if there is any overheat of components it autoshuts off at 80'c you can however select lower temps. GPUZ is also a very useful piece of software it can show you the hotspot and VRAM temps.
The main key point is airflow in the case and having the exhaust or intake in the wrong place can cause anomalies or having the case as all exhaust will cause negative air pressure (higher temps), but a load temp on a GPU of 60c is pretty good on water because you have to take into account ambient temps (air going into the case). I think you should be fine with temps of 60c on load, doesn't most of these cards run hot anyway i know that AMD Cards in particular do upto 110'c !!
Might be worth reading this
https://www.tweaktown.com/reviews/9827/nvidia-geforce-rtx-3080-ti-founders-edition/index.html
it seems that anywhere between 60 - 66c on load between 1800mhz - 2000mhz is a sweet spot.