Question Do I need a new motherboard for a new CPU?

[gellyphish]

so im kinda new to pc building. i bought my pc pre built a few years ago for $900. it came with an i7-7700, gtx 1060 and 16gbs of ram. i recently started to slowly upgrade it, i put in a 2080 super and a 750w power supply. now im looking for a new cpu because mine is bottlenecking the 2080, and im looking at an i7 9700k and possibly some more ram. will i need a new motherboard for this? sorry if its a dumb question, motherboards are the part that i know least about. thank you.

 

[CountMike]

so im kinda new to pc building. i bought my pc pre built a few years ago for $900. it came with an i7-7700, gtx 1060 and 16gbs of ram. i recently started to slowly upgrade it, i put in a 2080 super and a 750w power supply. now im looking for a new cpu because mine is bottlenecking the 2080, and im looking at an i7 9700k and possibly some more ram. will i need a new motherboard for this? sorry if its a dumb question, motherboards are the part that i know least about. thank you.

Yes.