This may be a stupid question, but I was thinking about buying a fully assembled desktop PC, an HP Pavilion to be precise ( Link: HP Pavilion Desktop Intel Core i7 8GB Memory 500GB Hard Drive 500-290 - Best Buy
). I don't know much about PCs, however I do know that this one uses a GPU that is built into the motherboard. It is an Intel® HD Graphics 4600, which won't be adequate for gaming. So I want to upgrade it with a graphics card, but I don't know how to start. For instance; which cards are compatible? Which cards are recommended? I'd really appreciate recommendations for a compatible card that is reasonably priced, and would handle games/media output at 1080p, and medium/high settings. Thanks in advance.