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=== Simultaneous MultiThreading (SMT) ===
 
=== Simultaneous MultiThreading (SMT) ===
Perhaps the single biggest enhancement to Zen is the addition of full-fledged [[simultaneous multithreading]] (SMT) support (a technology similar to {{intel|Hyper-Threading}} found in Intel processors). This is a departure from AMD's previous lightweight (and largely ineffective and to some degree misleading) {{amd|Clustered Multithreading}} (CMT). Zen is a properly simultaneous multi-threaded machine capable of handling two threads of execution throughout the entire machine. Below is a breakdown of how the various core components work under SMT:
+
Perhaps the single biggest enhancement to Zen is the addition of full-fledged [[simultaneous multithreading]] (SMT) support. This is a departure from AMD's previous lightweight (and largely ineffective and to some degree misleading) {{amd|Clustered Multithreading}} (CMT). Zen is a properly simultaneous multi-threaded machine capable of handling two threads of execution throughout the entire machine. Below is a breakdown of how the various core components work under SMT:
  
 
[[File:amd zen hc28 smt.png|400px|left]]
 
[[File:amd zen hc28 smt.png|400px|left]]

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codenameZen +
core count4 +, 6 +, 8 +, 16 +, 24 +, 32 + and 12 +
designerAMD +
first launchedMarch 2, 2017 +
full page nameamd/microarchitectures/zen +
instance ofmicroarchitecture +
instruction set architecturex86-64 +
manufacturerGlobalFoundries +
microarchitecture typeCPU +
nameZen +
pipeline stages19 +
process14 nm (0.014 μm, 1.4e-5 mm) +