The graphics card is what ultimately determines a PC’s gaming performance. All other things being equal, upgrading to ta faster card will significantly improve your gaming frame rates.
Which graphics card to get depends on your monitor resolution and desired level of detail. An entry-level GPU (the graphics processor) may be more than sufficient for playing casual and eSports titles on a 1080p monitor. Some AAA titles will require a mid-range card to run, especially at 1440p resolution and above. To play almost anything at 4K (2160p) with good frame rates, you are going to need a high-end GPU. If there’s one component you should never compromise on in a gaming PC, it is definitely the video card.