Dell C2422HE User Manual page 47

Connecting the DP cable
DP
Connecting the monitor for DP Multi-Stream Transport (MST)
function (
C2422HE/C2722DE only
DP
NOTE: Supports the DP MST feature. To make use of this feature, your PC
Graphics Card must be certified to at least DP1.2 with MST option.
NOTE: Remove the rubber plug when using DP out connector.
)
DP DP out
Setting up the monitor
DP
DP
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