Asus ROG laptops that do not explicitly state Optimus support have the CPU's integrated graphics disabled by default. It's as simple as that - the dedicated card will provide video signal for everything starting with BIOS/POST screens, all the external ports are a part of the dedicated card, etc.
The fact that you do not see the integrated graphics anywhere would definitely mean it is disabled for good. In other words, it cannot cause conflicts.
He who invokes history is always secure.
The dead will not rise to witness against him.
You can accuse them of any deeds you like.
Their reply will always be silence.