Oh man, I installed my 1070 mostly to play The Witcher 3's DLC. Install my 1070 and update the drivers, go into Steam and hit play on The Witcher. Nothing. Acts like its starting the game, Steam says its running for about a second or two then acts like it never even launched the game. No error message or anything. Every other game works fine but The Witcher isn't working and that's the game I was mostly getting my 1070 for. Ughh, now for endless troubleshooting. Any suggestions? I've tried verifying the game cache and that didn't solve anything. I'm wondering if I need to roll back the drivers maybe? Granted, I can only go back 1 driver with the 1070 but I never had this issue with my 970 and The Witcher, although I don't think I had really played it since May, so I don't know if any game patch or update may have messed things up in between then and now.