SP5 power limit is around 500W I believe. The new SP7 expected for EPYC Zen 6 is going to be around 1000W.
It isn't reasonable to expect core counts to go DOWN from Turin models to Zen 6 models. I don't care what rumor you are parroting.
Additonally, having only bumped memory speeds from 6000MT to 6400MT means that they will absolutely need more IOD's. The rumor is up to 16 memory channels. Each IOD has 4 channels so that would mean 4 IOD's.
4 IOD's each having 4 CCD's will be the max config for BOTH EPYC standard (Zen 6) and EPYC Dense (Zen 6c) configurations. The difference will be in the number of cores on the CCD.
Someone feel free to knock holes in this line of argument.
In one of the subsequent videos on MLID (post his Zen 6 Vienna video). I tried to find it but could not. It is buried deep in the video, hard to find.
Original video ha each IOD with 2 CCD connections and presumably 4 memory channels.
Subsequent video showed 2 of the IODs merged, with IOD having 4 CCD connections and presumably 8 memory channels.
But that does not address your main point, of why AMD would go down:
- from 16 Zen 5 CCDx x 8 cores = 128 cores
- to 8 Zen 6 CCDs x 12 cores = 96 cores
It seems like a split in Venice product line between highest per thread performance and highest number of simultaneous threads. Which is not a crazy idea...
- from with 8 CCDs x 12 cores