Asus Rog Srtix G731GU External monitor compatibility

[mohamed_essayed]

I'm planning to purchase an external monitor for my Asus Rog Srtix G G731GU laptop to game on it. Can I take the full advantage of the monitor with my laptop such as the 280Hz using USB Type C to Display Port cable ? or via the HDMI2.0b port ? and I need to know if these ports connected to the intel or the nvidia GPU in other word will the nvidia optimus bottleneck the external monitor and make it laggy ??
I connected the laptop to an old 60Hz monitor and its laggy not playable at all I don't know if this will be the case if connected to a new monitor with new cables
myspecs
core i7 9750H
GTX 1660Ti
16GB RAM dual channel

Thank you.

[Blake@ROG]

Hello mohamed,
The HDMI port maximum output is 4K 60HZ
and the Type C display port is 5120*3200,60HZ.
Above information for your reference.
Thank you.