Games shut down by themselves. - The game starts and cuts out after a while

Hello.
I am a new user. If I wrote in the wrong section, sorry.

I have a problem with the computer, so the computer turns off the game for a while without any message, sometimes BlueScreen will pop up.
I play CS: GO and GTA V games. Sometimes CS: GO is fine, it doesn't turn off the game, but in GTA V, the application turns off in the middle of the mission.


It is a new computer with a new system. In it sits:

- GTX 1050 TI Graphics Card
-Main Board Gigabyte H170M-D3H DDR3
- i5 7500 3.4GHz processor
-Samsung 250GB SSD
- Antec 750W power supply
-Windows 7
-16GB RAM 1600MHz
I will add that I had to update the BIOS because the computer did not see this processor. (Did not start)

Anyone maybe have some advice suggestions? I am helpless. I tried everything, different driver programs, reinstall the system and still the same. I would like professional help.

Best regards.

By the way, such a powerful power supply does not make sense
Instead, I would prefer a weaker power supply and a faster frame.

What temperatures do components reach under stress?

I know, buddy, I know, but I had the opportunity to buy from a friend at a good price and I did.

I would have to check what the temperatures are. Will you advise which program is the best?
Added after 1 [hours] 52 [minutes]:


While playing GTA V

TEST DONE ON GTX 970.

The temperatures are normal.
What message is popping up on this BlueScreen?
Check the event log if you see anything suspicious that may be causing this computer behavior.