Recently I upgraded one of the 2k displays to a 144hz display. (LG 27GL850). On this screen it's perfect, runs like a dream, super low input lag etc etc...

However, now the game runs like sh!t on the TV. I've tried every combination in the NVIDIA control panel but it basically feels like it's running about 30fps with increase input lag....really bad. The TV is HiSense 4k, even at 1080p 60hz it's dogsh!t slow.

Tried V-sync - off, on, adaptive, adaptive half, fast.
Low Latency mode, reinstalled the drivers, rolled back to previous driver version, wiped the control panel game presets.

Before I hooked the new 144hz screen it was absolutely fine on the TV, I was playing at 2160 x 1440 resolution at 60hz.

I should add that other games run fine and are completely smooth.

PC i7 4790k, 1080Ti
Screens, LG 27GL850, Dell 25" 2k, Hisense 4k TV