AMD’s Radeon RX 6000 Series launched in November with the RX 6800 and RX 6800 XT, and the Big Navi promise was fulfilled on December 8 with the launch of the 80-CU RX 6900 XT. These cards, like so many tech things this year, are only available for moments at a time – and it helps to have a physical location (i.e. Microcenter) nearby if you actually want to buy one.