Most likely something stupid lol you could run this game on a 20 year old computer without any lag

bloatware, malware, extra background processes, unused programs, overheating, memory failure, corrupt video driver (delete and reinstall driver completely and download from manufacturer (nvidia?) site.

You can always tell the application to use integrated video as opposed to your card.

In terms of hardware and performance gains: Not much has been gained.
It's 99% software and 1% hardware in reality (although that's a colluded conspiracy theory).

Look at Android vs. iOS solutions.

Android: Hardware *insert eatingCereal.gif*
iOS: Improve software *insert pinkFloyd.jpg*

Proof is in the pudding.