AMD Zen 4
Release Date: mid/late 2022
"In Design" as of Nov 2018
"On Track" for 2021 launch as of Dec 9, 2019, possibly not true anymore
5 nm TSMC process
DDR5 memory support
Improves IPC by up to 29%
Server platform codenamed "Genoa", 320 W TDP, up to 400 W
Server socket: SP5, 6096-pin LGA
PCI-Express Gen 5
More cores per chiplet
Support for AVX512 instructions, also BFloat16 and "other ISA extensions."
Uses 3rd generation Infinity Fabric, which adds cache-coherent unified memory
Desktop changes socket to AM5
Uses Socket SP5 for EPYC
Nov 2020 statement from AMD: "Zen 4 is going to have a similar long list of things, where you look at everything from the caches, to the branch prediction, [to] the number of gates in the execution pipeline. Everything is scrutinized to squeeze more performance out."
Adds support for USB 4.0