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[Lars Hansson <1391422@xxxxxxxxxxxxxxxxxx>]

Actually, I think I know what the problem is. The 820M is one of those
card with a boost feature and on Windows the driver will boost until the
GPU temperature reaches 70C, then the driver will start downclocking the
GPU. On Linux this feature seems to be missing, the driver never
downlocks and the card will boost until either powerclamp starts
injecting insane amounts of idle time or (if you have disabled
powerclamp) the temperature reach the thermal limit (~96C).

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https://bugs.launchpad.net/bugs/1391422

Title:
  GeForce 820M running very hot in Ubuntu

Status in xorg package in Ubuntu:
  Incomplete

Bug description:
  Ubuntu release: Ubuntu 14.10
  Wine: 1:1.6.2-0ubuntu6
  GPU: Intel HD 4000+Nvidia GeForce 820M
  Nvidia drivers: nvidia-331-updates

  Expected behaviour: GPU temperature should not be excessively high
  when running OpenGL games.

  What happens: The GPU temperature gets very high when running OpenGL games. For example, running "The Talos Principle Public Beta" from Steam in Ubuntu the GPU temperature will go up to 95-98C but running the same in Windows 8.1 (on the same laptop)  the temperature stays below 80.
  The same thing happens when running other games and games in wine.

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