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Zen 4 - Microarchitectures - AMD
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Zen 4 µarch
General Info
Arch TypeCPU
DesignerAMD
ManufacturerTSMC
Process5 nm
Succession

Zen 4 is a planned microarchitecture being developed by AMD as a successor to Zen 3.

History[edit]

Zen 4 on the roadmap.

Zen 4 was first mentioned by Forrest Norrod during AMD's EPYC One Year Anniversary webinar. During the next horizon event which was held on November 6, 2018, AMD stated that Zen 4 was at the design completion phase.

Process Technology[edit]

AMD claims that Zen4 is going to be produced on a 5nm node by TSMC.

Codenames[edit]

Symbol version future.svg Preliminary Data! Information presented in this article deal with future products, data, features, and specifications that have yet to be finalized, announced, or released. Information may be incomplete and can change by final release.
Core C/T Target
Genoa Up to 96/192 High-end server multiprocessors
Warhol Up to 20/40 Mainstream to high-end desktops & enthusiasts market processors
Rembrandt Up to 8/16 Mainstream desktop & mobile processors with GPU

Architecture[edit]

Little is currently known about the architectural improvements that are being done to Zen 4.

Key changes from Zen 3[edit]

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raised core/thread count from 64/128 to at least 96/192 (vastly due to 5nm process allowing more space, therefore more cores).

improved cache load, write and prefetch from/to register (less latency).

improved iGPUs for APU variants; navi integrated gpu with up to 3.4 TFLOPs FP32 (clock frequency unknown, at least 2 GHz).

utilizes new AM5 socket and is expected to support DDR5 and possibly PCIe 5.

more transistors (depending on AM5 socket as well and not just the CPU it self).

Bibliography[edit]

Designers[edit]

  • Mike Clark(?), chief architect

Bibliography[edit]

See Also[edit]

codenameZen 4 +
designerAMD +
full page nameamd/microarchitectures/zen 4 +
instance ofmicroarchitecture +
manufacturerTSMC +
microarchitecture typeCPU +
nameZen 4 +
process5 nm (0.005 μm, 5.0e-6 mm) +