How is theb LG 34UM68-P for gaming

Solution
1| If your system has an AMD graphics card that supports Freesync then you will see less of tearing. The reviews and the video I've seen of the monitor in action show that it's good for faced paced action/movements.

2| If the system's specs are that in you sig space, then you will need to look into a G-Sync or adaptive sync monitor. FYI, please post your systole's specs in the thread's body since sig space's will change over time and this solution/thread will seem irrelevant to others in the same boat as you.
1| If your system has an AMD graphics card that supports Freesync then you will see less of tearing. The reviews and the video I've seen of the monitor in action show that it's good for faced paced action/movements.

2| If the system's specs are that in you sig space, then you will need to look into a G-Sync or adaptive sync monitor. FYI, please post your systole's specs in the thread's body since sig space's will change over time and this solution/thread will seem irrelevant to others in the same boat as you.
 
Solution
thanks for the answer.
I do not find much value in adaptive sync as the Fast Sync in Pascal resolves both lag and tearing issues. A few cents more for the card running full speed are not the problem :)
Anyway when posted i missed that it's 2560x1080 monitor. I was looking for a reasonably priced 3440x1440 34" monitor with at least 75Hz.
After some research, decided to wait for the monitors with DP 1.4 that will enable over 120Hz, hopefully at 750 or less.
The best (overall) monitor today would be Dell U3415W - overclocked to 75-80Hz.