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.
What makes the thermal performance so impressive is the low noise levels at which the GameRock OC operates. Using the Performance BIOS, the fans run at 1390rpm, while the Silent BIOS slowed the fans down to 1290rpm, making it the quietest RTX 4080 we have tested so far.