When reading overclock.net and Stilt's take on ZEN2, i have found this little gem in the thread, coming from Russian site https://3dnews.ru/990367/obzor-amd-ryzen-9-3900x
https://3dnews.ru/assets/external/illustrations/2019/07/08/990367/image_2019-07-08_12-51-48.png
It might be DDR4 3600 lowering overall levels of latency, but those inter-CCD latencies are going to be amazing for server CPUs and will lead to quite a few wins. No more hidden gotchas when moving between CCXs and further, just flat sweet sub ~70ns for all inter thread comms.
Not only AMD will definitely rule those 1-2S system, but it seems that they will do so with amazing technical grace.
https://3dnews.ru/assets/external/illustrations/2019/07/08/990367/image_2019-07-08_12-51-48.png
It might be DDR4 3600 lowering overall levels of latency, but those inter-CCD latencies are going to be amazing for server CPUs and will lead to quite a few wins. No more hidden gotchas when moving between CCXs and further, just flat sweet sub ~70ns for all inter thread comms.
Not only AMD will definitely rule those 1-2S system, but it seems that they will do so with amazing technical grace.