This website mentions the Maximum Operating Temperature of the RX 580. But other Users have mentioned the GPU Card throttles at a lower temperature: Safe Temp: Search results for rx 580
Please translate your reply into English since this is an English Only Forum. Thanks
Don't know if this data is valid or not but I do know that other hardware shown here does corresponds to the official Max Temp of other manufacturer's website.
Best advice I can give you is to Open a AMD Service Request (Official AMD SUPPORT) and asked them if the information given on that website for the RX580 is valid or not from here: https://www.amd.com/en/support/contact-email-form