G5 drivers and alienware command center problems

I have the issue with a Dell G5-15, after 15 min it start having lag for 2-10 sec depends of the power required.

With a game on laptop display is lag for 2-3 sec with oculus is 10-15 sec. In the time of the lag  the games is start using Intel graphics instead of nvidia  even i select high performances

When the lag starts temperature on Cpu is reaching 100 degree C, and gpu is showing 70C. 

All this started after warranty of 1 year was finish.

I tried to contact the support before without success. 

Old Thread is here.