Asked devs before but didn't get an answer
For me, I run cumrooms in 2K with ultra in 100+fps on my system with r3 3100 + rx 580
Guess system requirements for 1080p on high graphic with 60+ fps are about:
i3-8100 / r3 2200 - or better
RX 470 / GTX 150 Ti - or better
Free 8gb of RAM for game
And free 2gb of HDD or SSD
But you could just download and tested it by yourself...