AMD launched its 7nm based Epyc Rome processors yesterday, bringing the fight to Intel in the lucrative server and Data Center space. Based on the same Zen 2 microarchitecture as Ryzen 3000, these monsters come with up to 64 cores, a massive 256MB L3 cache and a TDP of just 225W. Other than classified price-cuts, Intel seems all out of options and from the looks of it, the Zen onslaught will continue for the time being. One of the slides from yesterday’s Epyc event detailed AMD’s future roadmap, according to which Zen 3 is prepped and ready for production.

We will most likely see the Ryzen 4000 (Vermeer) processors in 2020 with Naples (Server) and Renoir (APU) towards the beginning of 2021. Intel, on the other hand, has got two more lineups based on the 14nm node, Comet Lake and Rocket Lake (Ice Lake and Tiger Lake won’t come to the mainstream PC market). You can guess who’ll be the CPU leader by then.

As already published in an older post, there are a lot of things we already know about Zen 3, plus there are a ton of rumors as well:

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 unlike Zen+ (Ryzen 2000) it won’t be a minor upgrade. Instead, we should see sizable gains comparable to the 3rd Gen Matisse chips.
  • The Fourth Gen Ryzen processors will be codenamed Vermeer, and it’s not clear whether the core counts will be scaled up or not but we will definitely see better performance per watt, as AMD improves the Zen 2 architecture to extract every ounce of performance from the more mature 7nm+ design.

Rumors: These are based on speculations and rumors from different sources so take them with a grain of salt:

  • Zen 3 will support DDR5 RAM. It’s not unthinkable as we should see the first samples by the end of this year. However, considering that the fact that Milan (4th Gen Epyc) will be limited to DDR4 it’s improbable.
  • Zen 3 might support PCIe 5. This also sounds like the result of wishful thinking, as most devices aren’t even able to saturate PCI 3 at present, and PCIe 4 isn’t being properly utilized either. So PCIe 5 just one year after PCIe 4 is highly unexpected.
  • Zen 3 will have improved SMT support. At present, both AMD and Intel are able to double the simultaneous thread count by Simultaneous Multi-Threading and Hyper-Threading, respectively. But as per some unverified reports, Vermeer might allow four simultaneous threads per core. That would significantly boost the multi-threaded performance, and cut the need for more cores. Now, theoretically this is possible but whether this will be practical and actually improve multi-tasking isn’t quite clear.

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 only know the codenames of the future Threadripper lineups. 3rd Gen will be called Castle Peak while 4th gen will be named Genesis. They’ll be based on the Zen 2 and Zen 3 designs, respectively with the former expected to launch this October with a core count of up to 64 cores.

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