New mobo+cpu(7700k+ gigabyte z270mx), gtx 2070 only 1 of 3 display port works

[Stoogie]

Got my bro's 7700k so had to buy a new motherboard so got a z270mx from pcmeal(which is authorized gigabyte reseller in aus) everything is fine and perfect except the first 2 display ports dont work (no signal) anymore(all 3 worked in previous motherboard asus vi hero), like i only use a display port for pg279q and a hdmi for my 2nd monitor so. Should i just ignore it, got 3 years warranty anyway. Anyone else have this issue? only thing to change is motherboard again, could change pcie slot but then itll be at 8x.