So I got a MSI GTX 970 about two months ago and everything has been going perfectly fine until recently. What's happening is the screen will go black for about 1-3s and then it will come back up and continue working perfectly fine. This happens completely randomly... sometimes I'll play a game and nothing will happen and it will work fine with no crashes, other times I'll be browsing a website and it will happen. So I'm honestly not sure what's causing this. I recently updated the drivers a few times that were for the new game released as well as the GTX 980Ti release. I also overclocked my GPU recently, the overclock was completely stable in Unigine Heaven 4.0 and FurMark, but then I ran a game (Witcher 3) and it crashed so I lowered the overclock and it seemed completely stable until this started happening. I then completely reset the GPU so there's no overclock and it keeps happening. I don't think I actually damaged the card because the temps never got above 70-75 degrees and I never saw a single artifact. Games still run perfectly fine and everything else does except for when this happens, it's just sort of annoying as it happens randomly. Also, for some reason when the screen goes black there's no popup saying that Nvidia drivers have crashed, instead there's just a little warning icon in the taskbar in the bottom right corner and when I click on it, it just disappears. I've never had anything like this happen before so I'm really not sure what's going on. Any help would be really appreciated.
System Info:
i7-2600k @ 4.2GHz
Asus Sabertooth Z77 Motherboard
MSI GTX 970
TX850M PSU
Adata 120GB SSD + 1TB WD Black HDD
Windows 7 Home Premium 64-bit