Hi,
I want to report your problem regarding the “gpu temperature” value of overwatch in-game HUD.
With radeon rx 5700xt gpu, the value is always “0”
Some programs had the same problem (OCCT & HWmonitor), but after recent updates, they report the exact value!
This is not a gpu driver update problem.
My drivers are fully updated!
You should fix the compatibility of your value with the 5700xt gpu, thanks for your attention!
Hey, Gryzor! We’ve noticed this as well when checking for the temperatures on our end, the values are zeroed. This seems to be some sort of sensor issue or potentially as the card is fairly new, it may not be properly configured for certain values with what we typically use.
This is the technical support forums intended to assist with technical issues that can be resolved with troubleshooting. The value issue will be something that our Overwatch team will need to look into. If you did want to bug report this over to our team, our Bug Report forums is the place to do so, since this is the place where our team typically checks for bug reports 
Great! Good luck for a fast solution of the problem! …And thanks for the quick reply! 