ASUS recently made new BIOS updates available for several of its motherboards that suggest desktop Raven Ridge APUs are coming soon. The BIOS updates contain AGESA! V9 RavenPi-FPS-AM4 184.108.40.206 along with Raven Generic VBIOS to add support for the Zen-based Raven Ridge CPU cores and Vega-based graphics.
Desktop Raven Ridge APUs have been promised in AMD roadmaps for awhile now, but details are still scarce. These desktop parts have the same four CPU cores as Ryzen Mobile Ryzen 5 2500U and Ryzen 7 2700U, but will run with higher TDPs (up to 65W) and higher clockspeeds along with a much larger GPU with up to 11 CUs (704 Vega cores). As of this writing the rumors of a HBM-equipped APU is still just that, a rumor. The first desktop Raven Ridge parts are sure to use standard DDR4, however.
Speculation over at [H] suggests that ASUS may have jumped the gun a bit on making the BIOS updates available by a few days which suggests that AMD is planning a December launch for the desktop parts (likely a soft launch though hopefully not as terribly long as Bristol Ridge!) and BIOS updates coming from other manufacturers at that time.
Guru3D has a list of links to the BIOS updates currently available from ASUS covering 13 of their motherboards including X370, B350, and A320 PRIME series motherboards and X370 and B350 ROG STRIX motherboards. Missing from the AMD AM4 lineup are the EX-A320M-GAMING, PRIME A320M-C and -C R2.0, and ROG CROSSHAIR VI Hero and Extreme boards.
Interestingly, desktop Raven Ridge is the second APU generation to work with the AM4 socket, and is is allegedly not the last. AMD has stated previously that it intends to support the AM4 socket for quite a while and their own roadmaps list support for at least two more Ryzen CPU generations and one more generation of APUs. Specifically, AMD plans to support Bristol Ridge, Raven Ridge, and Picasso (which is essentially the Zen+ APU generation) APUs along with Summit Ridge (Zen), Pinnacle Ridge (“12nm” Zen+), and Matisse (“7nm” Zen 2) CPUs on the same AM4 socket which is refreshing to see. Of course, AMD is introducing new chipsets (e.g. X400 series with Pinnacle Ridge) with each new generation, but it is nice to know that at least there is an upgrade path if you want it and don’t need whatever new I/O the new motherboards offer.