During the Unigine Heaven & Valley benchmarks, my 460 peaked at 82C, then stabilized around 70-72C.
Below 90°C, the GPU is safe. 72°C stabilized in Unigine Heaven is very good news.i think below 80C is safe to say that its ok.
The classic failure mechanism of the MBP`s dGPU is related to thermal shock, as Apple in general opts to run consumer grade components as close to their upper limit as possible. This in general takes several years to rise it`s head resulting in premature failure of the dGPU. As for the longevity of the 2016`s dGPU we will see in time. The only real early indicator is operating temperatures; if Apple`s 2016 design can keep the dGPU below 80C - 85C under load it will be a good indication that Apple is looking to improve reliability.There is already some failures in another thread. When does Apple learn they can't do dGPUs.
This is a good number for consumer electronics, and hopefully a sign of Apple finally getting the mix right.i think below 80C is safe to say that its ok.
Below 90°C, the GPU is safe. 72°C stabilized in Unigine Heaven is very good news.
In comparaison, the 295x of my 5K iMac is almost all the time around 80°C and at full load can reach 105°C which is bad.