With 1 PC streaming in mind, I built a system that I know could play my games at a level that is set to ultra settings without issue along with running my OBS in the background and give the community I am trying to build a enjoyable experience while watching.
I am a MASSIVE ROG fan, to the level of fan boy for the brand. I based my build platform on this premise. I have a primary drive raid 0 of 2 M.2, and a data drive of 3x 1tb SSD drive, with a final drive for just OBS which is a 500GB SSD.