Forrest Norrod
"When asked about what kind of performance gain Milan's CPU core microarchitecture, which is known as Zen 3, will deliver relative to the Zen 2 microarchitecture that Rome relies on in terms of instructions processed per CPU clock cycle (IPC), Norrod observed that -- unlike Zen 2, which was more of an evolution of the Zen microarchitecture that powers first-gen Epyc CPUs -- Zen 3 will be based on a completely new architecture."
Completely new architecture = not Zen. Doesn't get more obvious than that.
What constitutes a completely new architecture is a very vague area. I guarantee you Zen3 will not be a completely new uarch like Zen was compared to the Bulldozer lineage. We'll have to wait and see the details when it releases to determine just how new this new architecture is but I suspect there will still be a ton of carry over from Zen/Zen2.
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