...best gamming pc...best buy...intel
Lesson of the day: don't go to best buy (or any retail store, really) for a gaming PC, especially if you don't know what you're looking for.
All the best buys near me don't even list graphics in the specs, so you probably just got sold whichever one had the best CPU and most RAM.
They also don't usually have anything tailored to gaming.
Just get yourself a cheap video card. Problem solved.
This, if it even has a slot to put it in and a power supply that's more than the bare minimum required to run the PC