Highly depends on the game. Some games just hate currently AMD Bulldozer derived cores due to the fact that they only use 1-2 threads for most things. Other newer games that can actually use 4-8 or even more cores will run fairly good and should not bottleneck. Seeing as the RX-480 comes in two flavors 4GB($200) and 8GB($230 ish) I would get the 8GB version to just to be on the safe side and not have to worry about lack of VRAM ever being an issue.