Can't find the "PowerTune" in my CCC (11.5). But i don't belive it would impact that greatly on your bitmining performance since functions like the one you described usually are made to save energy and not increase performance.
Yes, save energy by lowering the core speed which decreases performance.
Anyway I have found how to set PowerControl under linux. There are 2 undocumented functions in libatiadlxx.so
int ADL_Overdrive5_PowerControl_Set(int adapterIndex, int percent); // percent can be between -20 and 20
int ADL_Overdrive5_PowerControl_Get(int adapterIndex, int *resultPercent, int *yetUnknown); // don't know yet what is the third parameter, seems always 0
Using HD6970 setting core speed to 950Mhz and PowerControl percent to 20% significantly increases performance.
I think this will be added to AMDOverdriveCtrl soon and maybe AMD will release a CCC or aticonfig where these values can be set.
This can be useful for mining as well.
interesting.
"Using HD6970 setting core speed to 950Mhz and PowerControl percent to 20% significantly increases performance."