For now, however, we only know about two GPUs. The B580 is the card Intel is pushing right now, which arrives on December 13 ...
Because Intel says the drivers for the new Battlemage-based B580 board suffer from "no known issues of any kind." Yup, really ...
On PCWorld's The Full Nerd Podcast, Intel's Tom Petersen has confirmed that Intel is already working on Xe4 and that Xe3 or 'Battlemage-next' is finalized.