Single display:Single display HDMI 1: up to 3840 x 2160 @ 30 Hz (60Hz on MacBook)Single display DisplayPort 1: up to 3840 x 2160 @ 60 HzSingle display HDMI 2: up to 3840 x 2160 @ 60 HzSingle display DisplayPort 2: up to 3840 x 2160 @ 60 HzDual display:HDMI 1/DisplayPort 1 + HDMI 2/DisplayPort2 up to 3840 x 2160 @ 30 HzTriple display:HDMI 1 up to 3840 x 2160 @ 30 Hz + DisplayPort 1 up to 1920 x 1080 @ 60 Hz + HDMI 2 or DisplayPort 2 up to 1920 x 1080 @ 60 HzDisplayPort over USB-C requires that your device supports DisplayPort Alt Mode. For extended screens, MST support is required otherwise you get screens in mirror mode.