MonoGame tick cannot go lower than 16ms

Question

I'm trying to build play with MonoGame and I'm trying basing this regarding the GameTime steps. In my main Game class that is being run in the main entrypoint of my project, I'm doing something like that:

gameScreen.IsFixedTimeStep = true;
gameScreen.TargetElapsedTime = TimeSpan.FromMilliseconds(1000d / 120);

With a TargetElapsedTime at about 8ms, the "Draw" method of my current screen should display an ElapsedGameTime of 8ms but it's always displaying me 16ms.

Is it normal? Can't we go lower than 60fps in FixedTimeStep? I've tried to make a custom loop on another running at 120 fps (without going through the MonoGame pre/post-draw) and it's running correctly.

Can you guys give me some hint?

[EDIT - Add more info] I've fetched few answers before asking my question and some people were talking about the Vsync issue. So i've set up this:

_graphics.SynchronizeWithVerticalRetrace = false;

But the result is the same

Answer 1

I was suggest on another platform this link:

http://community.monogame.net/t/cap-frame-rate-to-30-fps/10122

At the end of the post, someone suggest this:

graphics.PreparingDeviceSettings += (sender, e) => 
{                
    e.GraphicsDeviceInformation.PresentationParameters.PresentationInterval = PresentInterval.Two;
};

This solution helped me to fix my solution, but I had to tweak it a little beat. In order to make it work, I had to do this:

graphics.PreparingDeviceSettings += (sender, e) => 
{                
    e.GraphicsDeviceInformation.PresentationParameters.PresentationInterval = PresentInterval.Immediate;
};

Some doc on the internet say that regarding this parameter:

"PresentInterval.Immediate can be used to perform the flip as soon as possible and not wait for the vertical rectrace. Although your game can suffer from tearing artifcats, this mode is helpful when performing performance analysis because it does not limit the speed at which your game can draw."

If anyone have more information, or up and down about this solution, feel free to say it to me.