Hey, it is completely normal.
I bought ASUS Dual GTX 1060 3G graphics card.
First times, it doesn't support 0dB fan function.
Later on, Asus launched BIOS update for it. This update added 0dB function to my GPU.
I used ASUS Strix RX 480 before. It always stops its fans when GPU temp below 55 degrees.
But 0dB function of Dual series card which have NVIDIA GPUs, unfortunately only works with Nvidia drivers. When Nvidia driver is active and GPU temp. is below 55 degrees, fans will not spin. But when Nvidia drivers are deactivated (restarting, turning off and switching to sleep mode the PC or when you access to BIOS-UEFI of motherboard.) fans will spin up to %100 speed.
This isn't create problems on desktop usage. But when you want to run some tests, especially MemTest86 or something, it is really really annoying. Just use cheap older GPU with these tests.
You can recognize the first time you seated the vga card and open the windows OS. If Windows doesn't have Nvidia drivers, fans spin crazy!
Also when you update the Nvidia drivers with DDU method, fans spin again because of lacking Nvidia drivers for some time.
Nvidia drivers are active, when you see the "password screen"
Anyway, it is normal. You' ll get use to it bro.