LoL unplayable after newest Nvidia driver

2 days ago a new Nidia driver for WIndows 10 came out, version 355.60. After that update lol became unplayable for me, fps at the beginning of a game are around 20fps with drops to 0, after a minute into the game it's higher but still with drops to 0 every few seconds. It's the worst in fullscreen and uncapped framerate, not as bad in 60fps capped and windowed or borderless mode. Also the HUD is blinking the whole time in fullscreen. I also noticed that G-Sync isn't working. Tearing and above 60 fps (G-Sync should cap it at 60 fps). I used the same settings in other games, it worked perfectly in those. So only LoL has this problem. Also reverting the driver back to 353.62 fixed the problem, so it has to be a problem with the new driver.

My pc: i7-4790k 980 Ti 16 GB RAM Windows 10 64 bit Playing in either 1440p or 2160p. (changing from time to time)