Far Cry 4 - computer froze. Only hard reset helps.

[sde444]

Hello. Yesterday when playing Far Cry 4 my computer suddenly freezes with "BZZZZZ" sound.
Only hard reset helps. So after reset i again run Far Cry 4 and left for 12 hours in background. And after 12 hours without freez, all fine. But why i was had one single freez yesterday ( only hard reset helps ) ?
There is no any minidumps file to analyze. Minidump folder is empty.
I run even Prime95 for 10 hours, without errors.

My pc is:
4790 stock
8gb ram
Sabertooth Z79 Mark2
Asus Strix 980 ( Oc factory )
Corsair 750 RM
HDD 500GB SATAIII


I dont OC my pc, all is stock.
I am using 334.75 WHQL.

IS this game\software problem or hardware?
Like i say all is fine now, but i am worried about that one single freez ( only hard reset helps ) from yesterday.
Thank you for any suggestion.
Should i be worried?
It happens once, so thats why i create a topic problem. Because i want to know , what caused that one single freez. I never had freez like this even before.
I tested PRime95, 3dmark 11 and after few hours without errors\crashes.

[Nate152]

You could try updating the NVidia driver to the latest one - 347.88

[Chino]

It can be a game error or RAM error.

[sde444]

Even if hard lock forcing me to reset the PC it can be game issue? Not hardware?
( ctrl alt del and so on didn't work I had to pull the power and restart. )

[Chino]

Yes, it can go either way. You can also run Memtest86+ to discard it being a problem with your RAM.

[sde444]

It can be software or hardware problem? Like i say it happened once2 days ago. After that now i am 58 hours in game without single freez\crash.
Also Prime95 was tested without crashes.

[Chino]

If it only happened once and it only occur in Far Cry 4, then the game is at fault.

[sde444]

I have a last question.
After freeze my system event logs are empty. No minidump file.
Nothing appears in the Event Viewer other than the typical error messages stating that the previous shutdown was unexpected . So it can be game fault not hardware?

[Nate152]

yes it's more than likely the game you can try the latest NVidia driver.

[sde444]

Somebody told me that nothing in my minidump indicates that my hardware initiated the freeze
A clean minidump clearly indicates either a BIOS reset setting or a secondary hardware trip (power supply).

Is this true?