[EDIT]hmmm.....whats going on at AMD? (and history of 3Dfx Rampage)

[SteelCrysis]

https://www.techpowerup.com/228601/amds-...processors

The fact that this is even possible also begs the question as to why is it so - are the yields not good enough on the RX 460 chips that AMD is being forced to "lock" portions of a higher-end chip? I would wager this isn't likely, since Polaris 11 "Baffin" is such a small chip already that yield issues shouldn't have such effects. Most likely, we'd guess that AMD is re-purposing the mobile versions of the RX 480 (RX 480M, with some now suspicious-looking 1024 stream processors) that haven't passed power requirements for the 35 W those are rated at - but which surely correctly function at the RX 460's "up to 75 W" TDP. That might mean that AMD designed the original "Baffin" with 1024 stream processors for mobile devices, and carved the RX 460 as a way to recycle eventual defective dies that would surface for that particular SKU, not passing certification. But yields being better than expected, and demand for RX 460 cards outweighing the defective chips' output, AMD was forced to soft lock the extra stream processors on the "Baffin" SKU to satisfy demands.