If I have ONI Open, even when paused if I open up either Heroes of the Storm or Overwatch (Both Blizzard Games) my 4GB 970 will populate an error saying all VRAM has been used and force close both programs.
Steps to Reproduce
Open a Largely Explored world, let it run for about 5 minutes and then tab out and open another game. Ether it should crash while launching the client or while loading into a game.
This issue has not been confirmed by a developer yet.