ulMinSystemMemoryClock 3206 drivers/gpu/drm/amd/include/atombios.h   ULONG                           ulMinSystemMemoryClock;       //in 10kHz unit
ulMinSystemMemoryClock 2753 drivers/gpu/drm/radeon/atombios.h   ULONG	                          ulMinSystemMemoryClock;	    //in 10kHz unit