Bro you have a sick as Pc !! Lucky!!
-
thousands of them are online already, we will see if i have time.
here is one - https://lanoc.org/review/video-cards/7290-gtx-1070-sli-testing?showall=1
-
this https://pcpartpicker.com/list/7gDPr7, get a gtx 1080 if you can spend a bit more