System Using Intel GPU Instead of NVIDIA

[cscs]

So these will give us decent information about the system:

inxi -Fazy
mhwd -li -l

For a guide on how to find info and format things, etc:

[HowTo] Request support

Difficulty: ★☆☆☆☆ Strong of its many members, the Manjaro support forum can provide you help whenever you have an issue with your Manjaro installation. But in order to work efficiently, we shall also ask you to follow three major points. Provide context Simply signaling an issue is rarely enough to understand how it occurred. It is thus important to provide details on how it happened: Detail prior actions leading to the issue. List solutions and guides you already tried, with links whene…

PS.
My guess is this is a hybrid/optimus/dual-gpu system and you just dont realize that and/or how to manage it. The output of the above will help confirm it and influence the following suggestions.