XB321HK - losing signal with 60hz / mouse lag on 30hz

AlphaScorpii
AlphaScorpii Member Posts: 3 New User
edited January 23 in 2018 Archives
Bought this monitor and thought I could not get 4K work on my Asus N550JV laptop (i7-4700HQ, 16gb, gt 750m 4gb) but actually it works with both HDMI (30hz) and miniDP->DP (30hz and 60hz).
I planned to buy new laptop as I thought I will need it but now I would rather try to make this one works.
Is it possible to make laptop run normal without losing signal on 60hz? Losing happens mostly when I open some application (for example chrome) or start to type or something..
Or, is it possible to remove mouse lag when on 30hz? I don't play games, just work on laptop and watch movies.

Thank you