Question Monitor doesnt stay at 144 hz at native res

[MikeC24]

Hello everyone , so i have been having alot of screen tearing issues for a long time now , and ive allways noticed that when in my native res (1920x1080) the hz on windows it only reaches 143 hz but if i lower the res to like 1919x1080 it gets the 144hz and the tearing almost goes away , is this normal ? because i think that the tearing might be caused because of this even if i cap it to 142 or 143 fps i still get tearing and also if i turn vsync on the tearing persists , my display is the MSI Optix Mag27c on the manual it says that it supports 144hz at native res so im not sure why it does this , windows 10......

 

[Fix_that_Glitch]

Do you have an Nvidia card, and is your monitor Freesync enabled?

 

[MikeC24]

Do you have an Nvidia card, and is your monitor Freesync enabled?

Thank you for replying
yeah i have a GTX 1080 and this monitor was ofered to me the person that bought it didnt know , but might that be the problem? because the display is also gsync compatible , with gsync enabled the tearing goes away but mouse movement gets very weird