AOC Q2790PQU 1440@60hz overlocking

Greetings to everyone!

AOC Q2790PQU 1440@60hz
V : 50 - 76 hz
H : 30 - 99 khz
use DP 1.2
geforce rtx 2080

Is it possible to increase refresh rate to 70-75hz without frame skipping?

I could not increase more than 62-63hz. Higher than 63hz artifacts appear... But test is successful...

Synchronization mode is auto. Maybe try other profiles (CVT or manual)? What settings to set in manual mode?

Thx!