Optimus is implemented by Bumblebee In ubuntu (the cooling effect is obvious)

Add Source: sudo add-Apt-repository PPA: Bumblebee/stable

Sudo apt-Get update

Install: sudo apt-Get install Bumblebee bumblebee

After installation: lspci | grep-I VGA

00:02. 0 VGA compatible Controller: Intel Corporation 2nd generation core processor family integrated graphics controller (Rev 09)

. 0 VGA compatible Controller: NVIDIA Corporation gfw.m [geforce GT 540 m] (Rev ff)

The exclusive display is disabled (if the exclusive display is still working, restart it and check again)

You can compare the results:

GlxspheresBytes
60.117755 frames/second

Optirun glxspheresBytes
100.931478 frames/second

The calorific value is slightly higher than that in windows, but there is almost no need to worry about it. The effect is very obvious.