I noticed that my recently bought Dell G3 15 was making some sort of grinding noise. I can only hear it when it's quiet and it doesn't affect the laptop's performance. I did a quick test and nothing showed up and everything was fine. Before I noticed the noise, I opened up my laptop because I tried to upgrade my ram, but I couldn't since it wasn't compatible. The noise can be heard coming from the lower right side of the laptop, where the vent thing is. It's either the hard drive, or I may have not tighten the screws correctly (I didn't have the proper screwdriver)