Not at all! 2k is still plenty sharp on a 15.6 inch display.
The driver board was sourced from taobao, there are many sellers selling the same board design but here's a link to one of it:
Taobao link
Yes, I sourced the panel and driver board seperately. It has DP1.2a.
Freesync works, it shows up as "non validated gysnc display" although you can enable gysnc in nvdia control panel it just blanks out once the option is applied.
Got this panel recently, its a great 15.6 inch panel with native 4k 120hz and wide gamut support. (B156ZAN05.1). Only using it at 1440p 120hz due to driver board DP 1.2 limitations.
Sorry for the LQ pic ?