Question about ASUS ROG Swift PG35VQ

Hello as far as i know you can only use the hdr mode at 145 or 165hz, but i'm not sure. so can someone help me? then i wanted to ask if i can use hdr at all with an asus gtx 1080ti 11gb, i7-7700k? or do i need a 20 series gk or the like? thanks for the help