Comment # 65
on bug 93826
from Alex Deucher
(In reply to iuno from comment #64) > (In reply to Alex Deucher from comment #63) > > > > Are you forcing the power state to high? The mclk shouldn't be affected by > > the display clock. > > No, setting the refresh rate to 144 results in high mclk, even when I set > power_dpm_force_performance_level to low or pp_dpm_mclk to 0. Using 120 Hz, > I could echo 0 or 1 to pp_dpm_mclk. I also got the power meter on now: > > memory dpm state 0 (150 MHz): 77 watts > memory dpm state 1 (1250 MHz): 112 watts > > So there is a difference of 35 watts. Using Windows, I'm below the 80 Watts > even with 144 Hz. Yes, that is independent of the patch in attachment 131983 [details] [review]. The driver disables dynamic mclk switching for refresh rates above 120 hz to avoid flickering.
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