The answer to your question is no -- if you want a system that uses the nVidia GPU as primary, you won't find it in the Inspiron G series. There is the XPS 9720, which with the high end RTX GPUs is hardwired that way.  So too are some Alienware models.  
Hello, i bought dell g15 5520 rtx 4gb from 1 week ago as all dell versions comes with Nvidia rtx graphics card, after i bought the laptop comes with Ubuntu, so i switched to windows after i changed to windows, no wifi no sound and i didn't find any rtx , so i downloaded the drivers from dell website, installed it, And i surprised that i saw laptop coming with 2 1-intel iris xe internal graphics card with 128 mb (main) and 2- Nvidia rtx 3050 4gb. The problem that i bought this laptop and i think its comes just with 1 graphics card rtx and rtx is the main graphics card 4gb but i found this iris xe 128 mb is the main  Now i need helping with just some information Is there any dell g15 version comes with just 1 graphics card rtx (main graphics card) or all version coming with intel 128 mb main + nvidia rtx ? Also if you can help for wireless driver cuz wireless driver not working.
G15 5520, Ubuntu Linux 20.04, change to Windows