For our temperature testing, we measure the peak GPU core temperature under load. A reading under load comes from running the 3DMark Time Spy stress test for 30 minutes.
In terms of out of the box thermal performance, both BIOS provide reductions in edge temperature compared to the reference design, with the Silent BIOS peaking at 77C, compared to 73C for the OC BIOS due to its more aggressive fan curve. Against the reference card, those are reductions of 4C for the Silent BIOS and 8C for the OC BIOS. Both modes also reduce the junction temperature, which hit 98C for the reference card.