Apple was slow to deliver on its promise, but here it is.
As of today, the new Mac Pro can be configured with one or two graphics cards AMD Radeon Pro W5700X (with 16GB of GDDR6 memory), effectively making the most affordable graphic upgrade option compared to the standard factory board a Radeon Pro 580X with 8GB of GDDR5 memory.
In the US, the upgrade costs $ 600 for one card or $ 1,600 for two; in Brazil, the game costs R $ 6,000 or R $ 16,000, respectively. (It's easy now, just add a zero.)
At least for now, the only option for the Radeon Pro W5700X is to configure it at the time of purchase. It may be that in the future, Apple will also sell separately.