Try with these lines in advancedsettings.xml
<advancedsettings>
<gui>
<algorithmdirtyregions>0</algorithmdirtyregions>
<smartredraw>true</smartredraw>
</gui>
</advancedsettings>
On my X92_S912 box “smart redrow” line lowers CPU temp in idle.
If it does not work for you, get a better cooling method for your box. With some work on my CPU cooling system I lowered the temp from 70°C to 50°C…