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, the GamingPro OC proved to be an exact match for the Founders Edition, with a peak GPU temperature of 69C, alongside the steady-state result of 68C. This is a very solid result for the GamingPro OC – it may be a larger card than the Founders Edition, but it is also running with a higher power target, so we can't complain here.