For our temperature testing, we measure steady-state GPU temperatures under load. A reading under load comes from running A Plague Tale: Requiem for 30 minutes.
As for out of the box thermal performance, the GamingPro OC is a clear improvement over the Nvidia FE. The Silent BIOS saw 6C reductions to both GPU and VRAM temperatures, while the Performance BIOS runs cooler still, hitting just 61C on the GPU and 66C on the VRAM.