Looks like Sapphire is one of the first to sell cards based on the full AMD Polaris 11 GPU. VideoCardz writes the firm rolled out a new Radeon RX 460 offering that features the full 1024 stream processors.
Launched under the Sapphire Nitro series, this RX 460 has 4GB GDDR5 memory and a 1250MHz core clockspeed. The card is only listed on the Sapphire China site so it may be a China-exclusively model, just like the Radeon RX 470D.
This version has Polaris 11 GPU with all 16 Compute Units enabled. So rather than wait for Radeon 500 series and Polaris refresh, you can now actually buy the full chip.
As I wrote over a month ago, a lot of Radeon RX 460 cards have 128 stream processors that can be unlocked via a BIOS flash. Now we're finally starting to see retail versions with the full Polaris 11. It's unknown why these weren't available at launch.