A:AnswerMonitors don't have a graphics card, that would be in your PC. From PC this monitor will accept a dvi, hdmi or display port cable. I'm using it with a display port cable from a laptop.
A:AnswerWorks great on PS4. It will not output at 144hz because games for PS4 max out at 60hz and you can only connect it via an HDMI cable which caps out way before 144hz. However I love using this monitor with my PS4. You will need to adjust settings on monitor to output the correct display. Make sure it is outputting HDMI because I believe the default is something different. And make sure your ps4 is setup to automatic display or 1080p. Yes you can talk to people with a MIC but not if it is connected to the monitor. I recommend connecting it to the controller or getting a bluetooth headset compatible with the ps4.