AMD brings down the cost of full-on 1080p gaming. AMD has been launching graphics processing units (GPUs) at a frenetic pace since October 2013. Right now, there is a combination of Radeon R7 and R9 GPUs that fill the $89-$199 price points. All cards use the Graphics Core Next (GCN) architecture and are, in one way or another, modifications of existing HD 7000-series parts. Here's how they line up against one another.