On 4/4/21 8:58 AM, Frederic Muller wrote:
RIght now 3 (I hoped) Dell, the coming back one is a HP.
1 Dell 24" 2560x1440 @ 60Hz
1 Dell 22" 1680x1050 @ 60Hz
1 Dell 17" 1280x1024 @... I think 60Hz but it's not connected for now
The HP coming back is a HD monitor, 23" and there 1920 x1080, I think
at 60Hz.
https://en.wikipedia.org/wiki/DisplayPort#Resolution_and_refresh_frequency_limits
2560x1440@60 requires 5.63 Gbps bandwidth.
1680x1050@60 requires 2.7 Gbps (I think)
1280x1024@60 requires 1.8 Gbps (again, I think)
1920x1080@60 requires 3.2 Gbps
The X1 Carbon 3rd Gen has one Mini DisplayPort (with roughly 12Gbps
bandwidth) and one HDMI port (roughly 6Gbps), and the manual indicates
support for three independent displays. That might indicate a
limitation of just one display per port, I'm not really sure about that.
But, hypothetically, there should be enough bandwidth to drive any three
of those displays with one monitor on HDMI and two monitors
daisy-chained over DisplayPort with no other devices required as long as
DisplayPort 1.2 is supported by both the laptop and the monitors. I
*think* it is on the X1 Carbon 3rd Gen. If your monitors don't support
DisplayPort daisy-chaining, but they do support DisplayPort, you might
be able to use a DisplayPort MST hub to link two monitors on one laptop
port.
If you don't have at least two DisplayPort monitors, then a dock with a
DisplayLink chip is probably your only option.
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