https://bugs.winehq.org/show_bug.cgi?id=52960
--- Comment #10 from Henri Verbeet hverbeet@gmail.com --- (In reply to Maxime from comment #9)
my tests yesterday were done with cmst enabled. Disable it allows to have a lowest cpu-load and temperature. I thought csmt was related to OpenGL only.
No, it's orthogonal; you can use either the OpenGL or Vulkan backend with csmt either enabled or disabled.