For our temperature testing, we measure the peak GPU core temperature under load. A reading under load comes from running Cyberpunk 2077 for 30 minutes.
We can see much more of a difference when look at thermals. Starting with the Founders Edition, our card hit 77C on the GPU, with the hot spot peaking 10C hotter. That makes it 4-5C warmer than the X3 OC, while the Suprim X is cooler still. The Gaming BIOS runs a more aggressive fan curve, so it kept the hot spot temperature down at just 74C, while the Silent BIOS saw the hot spot hit 81C as a result of its slower fan speeds.