I have the Dell Inspiron with the i5-6400 processor and 12GB RAM. I would like to swap out the current graphics card (Intel HD Graphics 530) with the GeForce GTX 960 (2GB or 4GB). Only question is, is this possible? And would it be compatible and run well? And should I do the 2GB or 4GB? Sorry my knowledge on computers is limited, I realized that my graphics card is garbage and that my processor could work with something a little more advanced. I just want to be able to run some games more smoothly.