This is an old issue and also applies to nVidia. Changes/renaming of game exe files so the driver profiles dont apply and sets in idle states. Its not long ago that as an example with EvE Online that alot of nVidia cards and some AMD cards overheated when in station. Simply due to missing idle states after some changed shadercode.

You can thank nVidia/AMD for poor designs and driverhacks. Same reason the drivers are like 100MB these days instead of 20.