This time around they are tipping the memory bus width for AMD's upcoming GPUs. They are known as Navi 31, 32, and 33, and go in descending order with Navi 31 being the RX 7900 XT.

As Wccftech notes, a GPU with 28Gb/s on a 512-bit memory bus can deliver almost 1.8TB/s of memory bandwidth, compared with around 1TB/s on the existing RTX 4090.