A:AnswerBased on the recommended system requirements for those games, it can most likely play Rainbow Six at "High" settings, and Call of Duty on "Medium" settings.
A:AnswerDisplayPort is recommended for 144Hz on most monitors. Some monitors are limited to 60Hz on HDMI even with HDMI 1.4. For troubleshooting help, please reach out to ASUS Support either by phone, chat, or email. https://www.asus.com/support/