In a community blog post (by way of PCGamesN) by Mithun Chandrasekhar -- Senior Manager, Product Management, Radeon Technologies Group at AMD -- AMD says, “Operating at up to 110°C Junction Temperature during typical gaming usage is expected and within spec.”
The post makes mention that instead of a single sensor to measure GPU core temps, there is now an array of sensors to measure hotspots and report back. Regarding thermal monitoring, Mithun says,
“With the AMD Radeon VII GPU we introduced enhanced thermal monitoring to further optimize GPU performance. We built upon that foundation with the Radeon RX 5700 series GPUs, and now utilize an extensive network of thermal sensors distributed across the entire GPU die to intelligently monitor and tune performance in response to granular GPU activity in real time.”
The post continues, making mention of hotspot measurement and throttling,
“Paired with this array of sensors is the ability to identify the ‘hotspot’ across the GPU die. Instead of setting a conservative ‘worst case’ throttling temperature for the entire die, the Radeon RX 5700 series GPUs will continue to opportunistically and aggressively ramp clocks until any one of the many available sensors hits the ‘hotspot’ or ‘Junction’ temperature of 110°C. Operating at up to 110°C Junction Temperature during typical gaming usage is expected and within spec.”
In our own testing, we measure a peak temp of 82 C with the 5700 XT when under load.