X79 :
144Hz will feel very smooth and will allow for higher FPS.
I think if the resolution is Full HD (1920 x1080p) that your GPU will handle it.
Don't take my word for it. Depends on how hard you pressure it.
Since when are GPUs human?
Anyway OP... You will benefit from it, but in games that your GPU struggles with(Crysis3, BF3, Metro Last Light), you will not get the full 144Hz.
I usually tell people to get a 120Hz monitor instead as the difference in price is huge but the actual dif is small. Since most GPUs can not even exceed 120FPS anyway.