They should be on automatically.
Unfortunately I haven’t found a file where their settings are stored. You can see them if you use Console mode but they don’t appear to save their settings in any of the usual places.
Easiest way of seeing what they are set to is to use Console mode -
- Open BDA and go to the Blizzard logo up top left.
- Click and go Settings
- Select “Game Settings” in the list on the left hand side (should be the 7th tab down)
- Under “World of Warcraft” click to enable Additional command line arguments
- In the box underneath that type in
-console - Click Done
- Launch World of Warcraft
Once the game boots up you can bring up console mode by pressing the tilde key (~) . The multithreaded cVars are under gxMT so type that in and you should be able to see their settings.
To disable a cVar setting in console -
name_of_cvar_setting new_value
eg
gxMTShadow 0
Note you need to have your graphics API set to D3D12 or Direct X 12 to see any of the multithreaded benefits.