Would this be the best and most demanding game out to verify overclocking stability? Yesterday I was working on my overclock playing this game. +78MHz and after playing a bit. It crashed out of no where and went back to desktop. It just suddenly closed. No errors or nothing. So, I backed it down to +65MHz and it did not crash. I was playing longer then before last time it crashed. I will be playing a lot more today. And I suppose if it crashes again. I will have to back down some more. Stock max boost is 1379MHz and ASIC 60.6% I was hoping to hit 1500MHz with this card at best since so many 960 owners seem to hit that with no problem. But, looks like I got a complete dud of a overclocker. I know nothing is guaranteed and it does come from the factory already with a high OC. But, I thought even stock. It would come close to hitting 1500MHz. Maybe I expected to much. I still love the card though! 

The overclock will need to be tested on a per-app basis as one game cannot predict stability for all other games. Inside the windows event viewer do you see anything related to the nvidia drivers?

May just be a game problem. Hard to troubleshoot something if you're not getting any error logging. Are you running windows 10?

See if you can replicate the problem using windows 7 as window 10 doesn't always log errors when things happen from what I've experienced. Windows 7 will always create a log when something happens. 

The card itself has dual bios. A master and performance. I was thinking about flipping the switch over to performance and maybe see if it will help overclocking better. The main difference. It raises the power target from 110% to 115%. I am not sure if that extra 5% will help though or worth it.