Display randomly goes black and sound becomes distorted (requiring forced shut down)

[Disneyreject]

OS: Windows 10 Home 64-bit
PSU: 750W - EVGA SuperNOVA
CPU: i5-3350P
Mobo: ASRock Z77 Extreme3
Mem: 16GB (2 x 8GB) DDR3
GPU: GTX 980 (EVGA)


As stated above, what is happening to my computer is that after a while of playing video games my displays will randomly go black and the sound will become VERY slow and distorted (sometimes the sound will stop all together after about 5-10 seconds other times it will just keep playing distorted).
Here is a video showing what happens to my audio in the described situation.
https://www.youtube.com/watch?v=xaw5Jjh-6Yw

Important things to note:

• 
  - I have reinstalled Windows more than once to try and resolve the issue that way, however no luck yet
  
  - This issue generally only happens while playing World of Warcraft and watching videos on my 2nd display at the same time. It's almost EXCLUSIVELY WoW, it has only happened maybe once in another game
  
  - Sometimes after it has happened once it will happen more frequently if I immediately force shut down and start playing again
  
  - I used to have reliability errors depicting Live Kernel Event, however in recent testing of the crashes those errors aren't popping up. In fact my computer isn't even fully recognizing what has happened it seems; sometimes it only lists the error that Windows was not shut down properly.

I have brought up this issue before to other people and was told to run Memtest x86 (hence why I am posting under memory). I did run it a while ago but found no issues. I am going to run it again tonight and will update here if anything comes up.


Any help would be greatly appreciated.

 

[Andrew1337]

Try removing your second display from your graphics card. See if that works.

You can swap another psu to the system and see if that does the diffrence.
Try updating all the drivers on the system: Motherboard, GPU, Windows and more if you have.

 

[Disneyreject]

Thanks Andrew, turns out when I ran Memtest again I found a huge issue.
Out of the 4 passes, each pass had a note which read:
[Note] RAM may be vulnerable to high frequency row hammer bit flips

After looking into what may cause this and when it might be a problem, I have discovered that my memory is basically unstable when under load from the same task over a long duration. IE: Playing World of Warcraft and watching videos for a few hours.

So the solution? Buy new ram