Is monitor can causes stutter in all games !!?

[ToastyX]

Stuttering is usually not a monitor problem. You can test frame rates here: https://testufo.com/

The KG241 is a 75 Hz monitor, and the KG241P is a 144 Hz monitor. If you have 144 Hz, then you have the KG241P. You don't need a monitor driver. "Generic PnP Monitor" is fine.

I'm not sure what "Voltage Swing" and "PreEmphasis" are exactly, but they can work around signal quality issues, which would cause blacking out, not stuttering.

HDCP is content protection, which encrypts the signal so it can't be copied. All monitors nowadays support HDCP, and that wouldn't cause stuttering.