dzernesto
overclock won't help.
 
You should try:
Use of DDU to uninstall the Nvidia driver and install again.
And update your MotherBoard BIOS (there is a lot of board manufactures that release bios update specifically for pascal GPUs)
 
If you run haven benchmark, does our GPU achieve 99% ?

I already used DDU... And already update my motherboard Bios to the last version available. I also updated the BIOS of the video card. And in haven benchmark and valley benchmark my GPU still in 95-99 % usage. . In games like Rise of the Tomb Raider, Battlefield 4, Battlefiled 1, Batman Arkham Knight, AC Syndicate, etc, etc, performance is much lower than the benchmarks (Haven, Valley)

Hmm. Sounds like it might be time to reinstall windows. Is your cpu running at advertised clocks when gaming?

Sajin
Hmm. Sounds like it might be time to reinstall windows. Is your cpu running at advertised clocks when gaming?

 My cpu are running at advertised clocks when gaming, tonight I will made a Windows clean installation in another Disc. And I'll see how it works. Then I post the results.
 
Theres no chance than my graphics card is broken?, (I hope not).

jm_loli

Sajin
Hmm. Sounds like it might be time to reinstall windows. Is your cpu running at advertised clocks when gaming?

My cpu are running at advertised clocks when gaming, tonight I will made a Windows clean installation in another Disc. And I'll see how it works. Then I post the results.
 
Theres no chance than my graphics card is broken?, (I hope not).

Your gpu appears to be working normally.

How are your game settings as you mentioned that you had GFE running. Sometimes if the settings are not set high enough hen the gpu does not need to work as hard. Maxing them out may help increase performance, such settings like resolution or texture scaling. 

Problem solved. Apparently it was a problem on my hard drive. I previously had performed a clean install of Windows 10 on this hard drive, but the results were the same. Last night I made a new installation but this time in a new hard drive, and testing with the same games the GPU usage was between 95-99%. Thanks everyone for your help. 

A hard drive causing low gpu utilization? That's interesting. Glad you got it fixed. 

Glad it is fixed.. That is a new issue I haven't heard of before. Good to know, and thank you for telling us as this may help in the future.