It is entirely possible for them to skip 12 and 16 cores for one generation. However, bumping the clocks of 12 and 16 core Zen 3 and renaming would be acceptable in my eyes. They could also do a limited release of Zen 4 for the higher end chips later on next year.If they want to release more cores than 8, then they can't skip chiplets, unless they will keep the current 12-16 core lineup and just rename It until Zen4.
In mobile I think we won't see more than 8 cores.
To continue this fun little exercise:
- Unified die should improve memory latency and lower power consumption.
- DDR5 would significantly increase memory bandwidth. This would provide a general performance uplift for many different types of applications, including games.
- They could bump up the L3 cache to full size, and possibly even add more cache for the iGPU. 12 CUs with 64 or 128mb cache would be interesting.
- With an expanded package power of 142W, and lower power consumption thanks to a rework, I bet the top of the line SKU could have an all core boost clocks should be significantly higher, and single core boost should hit 5.0 or even possibly 5.1ghz.
The advantage for the end user is the chip would actually be quite a bit faster than normal Zen 3. The addition of a GPU means that everyone who buys one and can't get a GPU will have an entry level one on board.
EDIT: Oh and I suspect the chip would be slightly cheaper to produce as well, since it will be on EUV, and the packaging will be simplified. They will also be able to pump them out faster.
EDIT: To add even more fuel to this fire, a 5980HX with a 54W TDP has a base/boost of 3.3-4.8 GHz. Compared with the 5800X, the base clock is 500 MHz slower, but the boost clock is 100 MHz higher. That is with half the TDP of a 5800X. I'm really curious how a Cezanne chip with a 105W TDP would perform.