Graphics Gpu core clock and gpu usage drops in games

Hello. I have Gigabyte 1080 Xtreme. After upgrade to Windows Anniversary i have weird problem with fps spikes in GTA V and Rise of Tomb Raider.
In GTA V and Rise of Tomb Raider i am getting random fps dips for a second. During fps dip there is core clock drop for example from 1975mhz to 291mhz. During this moment there is GPU LOAD,Core clock and voltage drop.GPUZ shows as reason UTIL.

Here is screen from Rise of Tomb Raider ( i added black arrows and you can see util in this moment ):




In previous Windows version ( 1511 ) i dont had that problem.


My pc:
6700K stock no OC
Corsair 750 RM
16gb ram


Is this something with my hardware?

 

Newest drivers? Clean install them anyway.

 

I am on 368.69. Anyway is this hardware related or software?

 

If you only want the answer to the question rather than a solution then I would be 99% sure it's software.

 

Have you checked the event viewer?

 

Nothing in event viewer. It just stutter fps for one second. During this moment GPU CORE CLOCK drop, voltage drop,gpu load drop for one second.

Screen ( i added black arrows ):

 

It is most likely software related.

 

The Anniversary update introduced WDDM 2.1. Even though Nvidia updated at the time for this, they didn't perform to their best with it until the 369.09 driver release. As you are still on the 368.69 drivers I would update your drivers (fully uninstalling the old one and cleaning the registry with DDU).