Re: [Trisquel-users] Overheating of Radeon HD 8550G when using open-source driver

[vitacell]

Year ago I must to doing reclock with very compliated patches, before  
Linux4.4. No more patches are needed for 4.4, but still needed to boot with  
nouveau.reclock parameter. But now, since kernel 4.5 you get everything out  
of the box, only thing you need is a compatible Kepler gpu (all Kepler  
supposed to be compatible, but some chips works better than others),  
GNU/Linux and terminal with root access.

https://www.phoronix.com/scan.php?page=news_item&px=linux-4.5-nouveu-pstate-howto
Reclock up, when you need 3d power, and after your tasks, just downclock.