Hi W10U. I'm Greg, a Volunteer Moderator and 10 years Windows MVP here to help you.
It's a good question, especially because as you may know many laptop manufacturer's customize the drivers - especially for the GPU - so first preference should always go to the driver from the PC manufacturer. In Dell's case you want to be sure to use the Service Tag so you know you're getting the exact build's drivers, as shown here:
https://www.dell.com/support/contents/us/en/04/...
and inputted here:
http://www.dell.com/support/home/us/en/19/Produ...
While there make sure that you also have the latest chipset, BIOS, display, network, bluetooth, USB and all other drivers, compared to the ones presently installed in Device Manager reached by right clicking the Start button.
With Dell you can also trust the Dell Support Assist or Dell Update utility (whichever came with your build) to update the drivers automatically.
I'd also make sure whether you have Switchable Dual Graphics which is managed a bit differently in the Nvidia software so that under stress it kicks in the video card. Study how this works here;
https://www.dell.com/support/kbdoc/en-us/000054...
http://www.geforce.com/hardware/technology/opti...
https://www.intel.com/content/www/us/en/support...
https://www.microcenter.com/tech_center/article...
https://www.intel.com/content/www/us/en/support...
There is also no harm in comparing the Nvidia and Intel drivers to what Dell offers. I'd try the auto-updaters from both, and if those aren't enough then manually search:
http://www.nvidia.com/Download/Scan.aspx?lang=e...
https://www.nvidia.com/Download/Find.aspx
http://www.intel.com/content/www/us/en/support/...
https://downloadcenter.intel.com/
If you want to discuss this more with Dell you can contact their Support or Forums:
https://www.dell.com/support/incidents-online/u...
https://www.dell.com/community/Dell-Community/c...
I hope this helps. Feel free to ask any questions. Based on the results you post back I may have other suggestions if necessary.
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