thanks for the info, I have RX570 ITX, and same situation as SF750, fun curve adjusted for silence. It will generate quite a lot of heat.
Im wondering what would be difference between Black Ridge (fan duct) with 120mm fan and vs Corsair H55.
If is something in range 5C for I7 8700 non K, its not worth of hassle
Either tbh - just remember that the motherboard compartment won't get any air flow with the 120 AIO and it gets quite toasty in this case.
If you are using the ITX GPU then the 92mm AIO could work as the GPU wont be pumping heat into it.
I am by no means an expert and this is just my opinion