AMD Ryzen 4000 CPU (Zen 4) Design Complete, Launching in 2020

Yesterday, AMD launched its Epyc Rome processors based on 7 nm, bringing Intel to the profitable server and data center room to battle. These monsters come with up to 64 cores, a massive 256 MB L3 cache and a TDP of just 225W, based on the same Zen 2 microarchitecture as Ryzen 3000. Other than categorized price cuts, Intel appears to be all out of choices, and from its looks, the Zen assault will proceed for now. One of the slides from the Epyc event of yesterday detailed the future roadmap of AMD, according to which Zen 3 is prepared and ready for production.


The Ryzen 4000 (Vermeer) processors are most probable to be seen by the start of 2021 with Naples (Server) and Renoir (APU) in 2020. On the other hand, Intel has two more lineups based on the 14 nm node, Comet Lake and Rocket Lake (Ice Lake and Tiger Lake will not be entering the mainstream PC industry). You can imagine by then who will be the leader of the CPU.

As already posted in an older article, we already understand a lot about Zen 3, plus a ton of rumors:

Ryzen 4000 Based on 7nm+ Zen 3 Cores (Vermer)

Confirmed: For starters, let’s go over what we know:

  • Zen 3 will be based on the 7nm+ node and will not be a minor upgrade unlike Zen+ (Ryzen 2000). Instead, similar to the 3rd Gen Matisse chips, we should see significant profits.
  • The Fourth Gen Ryzen processors will be codenamed Vermeer, and it’s not evident whether the key counts will be scaled up or not, but we’ll certainly see better output per watt as AMD improves the Zen 2 architecture to extract every ounce of quality from the more mature 7nm+ design.

Rumors: These are based on speculations and rumors from various sources, so bring them with a salt grain:

  • Zen 3 will support DDR5 RAM. It’s not unthinkable because by the end of this year we should see the first samples. However, considering that it is unlikely that the reality that Milan (4th Gen Epyc) is restricted to DDR4.
  • Zen 3 might support PCIe 5. This also sounds like the consequence of wishful thinking, as most systems are currently not even willing to saturate PCI 3, and PCIe 4 is also not being used correctly. So PCIe 5 is extremely unexpected only one year after PCIe 4.
  • Zen 3 will have improved SMT support. Currently, Simultaneous Multi-Threading and Hyper-Threading can double the concurrent thread count by both AMD and Intel. But Vermeer could allow four concurrent threads per core, as per some unverified accounts. That would increase the multi-threaded efficiency considerably and reduce the need for more cores. Now, this is theoretically feasible, but it is not quite evident whether this will be practical and actually enhance multi-tasking.

AMD Ryzen Threadripper 3rd and 4th Gen

ZenSummit Ridge 
(Ryzen 1000)
Raven Ridge 
(Ryzen 2000G)
(Ryzen TR 1900)
(EPYC 7001)
Zen +Pinnacle Ridge 
(Ryzen 2000)
(Ryzen 3000G)
(Ryzen TR 2900)
Zen 2Matisse 
(Ryzen 3000)
(Ryzen 4000G)
Castle Peak 
(Ryzen TR 3900?)
(EPY 7002)
Zen 3Vermer 
(Ryzen 4000)
? ? ?Genesis 
(Ryzen TR 4900?)
(EPYC 7003?)

We understand only future Threadripper lineups ‘ codenames. Castle Peak will be called the 3rd Gen while Genesis will be called the 4th gene. They will be based on the models Zen 2 and Zen 3, with the former anticipated to launch with a key count of up to 64 cores this October, respectively.

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