Ripsaw help needed to setup

Hi folks, I bought the ripsaw HD on the basis that it does 4k pass through. My scenario. 1x gaming machine with 2 screens 1x steaming machine with 1 screen Ripsaw connects via USB to streaming machine Hdmi out of gaming machine goes through ripsaw to 1440p monitor. When I turn on ripsaw gaming resolution drops to 1080p. Why if this had pass through. I tried it with the gaming screen on dv port and ripsaw on Hdmi but can not get it to show on obs on streaming machine. What am I doing wrong. Thanks. Steve.