7840HS/7940HS supports four displays, including the internal one. AMD did not specify the maximum resolution for each when three are involved, but they did specify these as the maximum DisplayPort output.
- 7680x4320 @ 60Hz
- 3840x2160 @ 240Hz
- 3440x1440 @ 360Hz
- 2560x1440 @ 480Hz
- 1920x1080 @ 600Hz