dxgmms1.sys BSOD randomly occures while gaming

Hi!
I bought a new PC about 6 months ago. Everything was fine and I played a lot of games since then without a single BSOD error. I always downloaded the latest Nvidia drivers and updated Windows regularly (apparently, this was my mistake!!).

However, I think it was after an Nvidia driver update that this dreadful BSODs started to appear randomly (most of them -if not all- have this error about dxgmms1.sys ...). They happen very rarely, some times after 10 hours of gaming or after 5 minutes of gaming. One time it appeared while I was away from PC (but had paused the game using ESC!)..

This errors however never appear in low-GPU-power demanding games.. they have appeared only in some of high demanding games (though I never experienced low fps or low-fps spikes):

-Watch Dogs (I regret ever buying this game. I'm absolutely sure that errors started to appeare first in this game... and I have played lots of games and some are way more demanding like Ryse Son of Rome, AC Unity, etc... none of which caused any BSOD errors)

-Shadow of Mordor (only 1 time and it was after that it had appeared in Watch Dogs. I had finished this game 2 times without a single incident.. but after I installed Watch Dogs and played SoM again, I encountered the error in this game as well)

-Dragon Age Inquisition (Even though my GPU temp reaches to 78 C for straight 8 hours or more in this game, BSOD happens randomly sometimes after 5 minutes of gaming and sometimes after 8 hours...)

-The Witcher 3 Wild Hunt (the most recent game I'm playing and having this problem with... also I get awful lots of crashes to desktop while playing this game)

BTW my gaming case has 5 fans (Green X4_Hexagon Case) and CPU temp never reaches above 57 C while gaming so I don't think it is a temp issue... although I admit my 970 g1 gaming is not getting cooled like other 970 g1 gamings do... they never get above 72 whereas I've reached 78! alas 78 is not 95 so I don't think this would be a cause..

My BSOD report according to BSOD instructions thread is included (most recent BSOD happened today, about 2 hours ago playing Witcher 3).

I searched myself, and arrived to this conclusion that AI Suite 3 may be the cause. So I disabled it a lot of times and problem still remains with no difference.

Thank you in advance ...

P.S. BTW I've never upgraded my GPU bios (one newer version is available and I don't know how or even if I should upgrade it...)

attached the report sir: