I think you are asking why does the card stay in a high clock state when 144hz refresh is selected for the monitor, and for 120hz refresh, it will properly drop to idle state.
I know NVidia had this issue too in the past. It does not surprise me if AMD has the same issue. When I had a 144hz monitor and nvidia gpu, I just kept it at 120hz, because I could not tell the difference. It might be problem with only with certain combinations of monitors and GPUs. The type of connection could be very important too.
Are you using Display port and HDMI for the connect? I recommend trying Display port if not already using that. I have no idea is that matters in this case or not.
Masu throne Thank you very much for reply .
I do not have an HDMI connection also display port connection It is a dual- link DVI connection .
Will the fact that the memory clock of the GPU returns to the idle clock even if the Hertz of the monitor it's display port or HDMI connection to 144Hz?
Will would up the memory clock of the GPU for some reason be connected that it is DVI connection with 144Hz compatible monitor ?
I do not think it would matter, but you never know. I am use to dealing with freesync and gsync which requires display port. Your monitor does not have either of those, so I guess it would not make a difference.
Best thing to do is use google and see if someone found a solution. Like I mentioned before, I personally just used my monitor at 120hz, because I preferred to have the card drop to normal idle speeds.
i gt same problem ..
r9 380x sapphire
Same problem here Gigabyte R9 380 4GB All the Crimson drivers have caused this problem for me. The card gets really hot at idle too if monitor at 144 hz The fans never come on.
Set the monitor to 120hz and no problems.