How can "View using CPU" result in better lines than "View using GPU" when my GPU has 3 times the RAM of my integrated Intel CPU graphics?

I refer to Adobe November 2017 post here: https://helpx.adobe.com/illustrator/kb/gpu-performance-errors-troubleshooting-workarounds.html

I have encountered two problems with working with my Illustrator artwork.

1. Rendered artwork appears jagged when in GPU Preview mode (View > View Using GPU) but NOT in CPU View Mode.

This is very concerning for me because I am using a newly acquired Adobe Recommended NVIDIA Quadro P1000. It is believed that GPU View mode should have superior performance to that of my CPU?

Furthermore, I chatted online with an official NVIDIA representative, last night,  and he did trouble shooting, and they ran diagnostics on my computer and have confirmed that my NVIDIA hardware and driver are up to date and running well. I also have a new computer with the latest 8^th Generation i7 processor at 3.2 Ghz.

Was I right in thinking (and buying) that my NVIDIA Quadro P1000 Graphics Card (3 gig RAM) ought to be better than my integrated Intel Graphics Card (1 GIG RAM)?

My thoughts are that I may have rendered my artwork in a way that may have made it appear jagged. But, still, "View using CPU" solves the problem anyway - no jagged lines (in other words excellent anti-aliasing). So I guess the "real problem" is that the performance of my Integrated Graphics Card is higher than my more powerful NVIDIA P1000!

Can this be? I've maxed out my NVIDIA Control Panel setting and have tried different combos and, still, View using CPU has  noticeably superior anti-aliasing!

I’m scared because when I move on to Adobe Premier Pro and After Effects, I really hope that my NVIDIA gets fully utilised then.

Note: I have NOT done Solution 2 on the site above, because the article was written on November 2, 2017 and my Adobe file names are newer and different (Adobe Illustrator 23). I don’t think it’ll help anyway as I am new to Illustrator and haven’t adjusted my preferences except for when Adobe recognized I have an NVIDIA graphics card. Anti-aliasing is ticked on. I suggest Adobe updates there Solution 2 instructions.