That's what I had been wondering with my evergreen card for months until I found out the clock speeds are not set correctly on my system.
Originally Posted by kraftman
If you haven't already make sure the clocks have been set to something reasonable:
I suspect power management is currently the biggest problem Radeon users have with Mesa.
I have slowly been doing something to improve the situation because my laptop has several useful clock modes that are not used at all even if I manually set "low", "mid", or "high"! Those almost randomly picked clock modes or the 2 that are used by dynpm are just not good enough in my case.
I wonder if it would be acceptable for mainline inclusion to make a kernel patch and an user mode program that could be used to manually select sane clock modes for fixed profiles and dynpm? Perhaps it could even be part of driconf?