can't get my monitor to 144hz

Sep 15, 2018
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i just bought a new monitor the benq xl2411 wich is 144hz but when i get into the game (rainbow six siege) it only goes to 60hz. i am using a dvi-d cable and when I right click and go to display settings it says 144hz is on.
so please help me with this don't want it to be a useless buy thanks.

(don't know if it maters but this are my pc specs:
Corsair DDR4 Vengeance LPX 2x8GB 2666 C16
Intel Core i5 8600K
inter-Tech Argus RGB-700W ATX
GiBy Z370M DS3H Z370
EVGA GeForce GTX 1060 6GB GDDR5 )
 
Solution
Maybe your game ini file is set to max cap at 60.
Use a different game where you can control the FPS speed, eg Overwatch has a slider bar so you can change FPS. I dont play R6