Question Dell s2417dg capped at 85 Hertz while being 144hertz

[Artonn]

My setup is 1080ti with displayport, that followed with the monitor. I moved and after upgrading my motherboard and CPU my max hertz was limited to 85 hertz even tho on my old setup it could reach 144 hertz.

 

[rgd1101]

motherboard and cpu shouldn't limit refresh rate
what the full system spec?