It's a little bit frustrating as I went with the Gigabyte over the ASRock board specifically because reviews found the Gigabyte board to have a quieter fan. Maybe I just got a bad one, but there do seem to be some other users out there suffering from the same problem.This is the first report I've read about such a noisy X570 chipset fan. I had seemed like the motherboard companies were choosing good quality fans. Let us know how the 40 mm Noctua does in both noise and cooling.
Some good info here about the replacement process:
Noctua offers 40mm fans in both 10mm and 20mm thick models. I'm trying the 20mm model as it's quieter and there appears to be enough room to find a way to mount it.