Buried deep within the footnotes of AMD's announcement of Rome, it seems AMD is claiming an IPC improvement of about 29% when comparing Zen 2 to Zen 1. AMD did not disclose exactly how much more IPC Zen 2 had over Zen 1, but it seems 20% or more for at least some workloads can be expected.
https://www.notebookcheck.net/AMD-claims-Zen-2-has-29-higher-IPC-than-Zen-1-in-certain-workloads.359556.0.html
Branch prediction not brand*. Try more and bring something unique and not news that we jave already heard. Clicking bait.
Thank you of informing me of this typo, sometimes my fingers slip. By the way, I checked to see if other outlets had reported on this news and I couldn't find that any had. Finally, I think you meant "have," not "jave." I think we can both understand how easy it is to make slight typos.
This 29% IPC increase in *certain* workloads is most likely attributed to introduction of proper 256-bit wide registers for AVX instructions. Zen1 used combined 128 bit registers for AVX, which was much slower