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 Metro Exodus Enhanced Edition for 30 minutes.
Speaking of fan curves, the Gaming OC's Silent BIOS is well worth using if you prefer a lower-noise experience, as the fans produced just 36dBa of noise. That's compared to 40dBa using the OC BIOS, where the three fans spun up to about 1800rpm, which still isn't awfully loud, but it's not super quiet either. There was no noticeable coil whine either.