Apparently AMD is working on a third GPU based on its “Polaris” (4th generation Graphics CoreNext) architecture, dubbed “Polaris 12.” Snooping into the code of AMDGPU DRM kernel driver, PCI-IDs 0x6980, 0x6981, 0x6985, 0x6986, 0x6987, and 0x699F, were pointing to a descriptor “Polaris 12.” There are no other known specifications of this chip.
Going by convention of Polaris 11 (Radeon RX 460) being a smaller chip than Polaris 10 (RX 470, RX 480), it’s likely that Polaris 12 could be an even smaller chip. On the other hand, a chip slower than Polaris 10 makes very little sense, because it would compete with “free” integrated graphics. Another possibility is that Polaris 12 is a Polaris 10 refresh on an improved process, or even made at TSMC, in which case the higher number would mean that it’s a newer chip.
Source: Phoronix
