https://bugs.freedesktop.org/show_bug.cgi?id=49981
--- Comment #20 from graham grhm.perry@gmail.com --- With voltage on high for every mode, temperature and power usage will be exactly the same as high profile, even with engine clocks low. Setting low profile will just mean you lose all the processing power, yet still have all the problems associated with high power profile. Seems a bizarre fix to me tbh.