We take our noise measurements with the sound meter positioned 1 foot from the graphics card. I measured the noise floor to be 32 dBA, thus anything above this level can be attributed to the graphics cards. The power supply is passive for the entire power output range we tested all graphics cards in, while all CPU and system fans were disabled. A reading under load comes from running Cyberpunk 2077 for 30 minutes.
Noise output from the Gaming OC Pro is also very low. Under load we saw the fans spin at 47%, or 1650rpm, producing just 35dBa on our sound meter. As far as graphics cards go, it doesn't get much quieter than that, and you certainly wouldn't be able to hear the card if it were installed in a case with system fans running.