diff --git a/data/grid5000/sites/nancy/clusters/grat/nodes/grat-1.json b/data/grid5000/sites/nancy/clusters/grat/nodes/grat-1.json
index aa349d6112af844fd757dd08b827da172afa5259..bfce356b636ec44f9d6f91581e98576012835551 100644
--- a/data/grid5000/sites/nancy/clusters/grat/nodes/grat-1.json
+++ b/data/grid5000/sites/nancy/clusters/grat/nodes/grat-1.json
@@ -309,7 +309,7 @@
     "clock_speed": 2100000000,
     "ht_capable": true,
     "instruction_set": "x86-64",
-    "microarchitecture": "Zen 2",
+    "microarchitecture": "Zen 3",
     "microcode": "0xa001173",
     "model": "AMD EPYC",
     "other_description": "AMD EPYC 7513 32-Core Processor",
diff --git a/input/grid5000/sites/nancy/clusters/grat/grat.yaml b/input/grid5000/sites/nancy/clusters/grat/grat.yaml
index 5a2ff8933a9ace45995c3c36f9e3a50cb6cf89d1..990d2f51bc433d3261922543fada881db2ac2ec0 100644
--- a/input/grid5000/sites/nancy/clusters/grat/grat.yaml
+++ b/input/grid5000/sites/nancy/clusters/grat/grat.yaml
@@ -13,7 +13,7 @@ nodes:
       besteffort: true
       max_walltime: 0
     processor:
-      microarchitecture: Zen 2
+      microarchitecture: Zen 3
       clock_speed: 2100000000
     software:
       standard-environment: debian11-x64-std
diff --git a/lib/refrepo/gen/wiki/generators/hardware.rb b/lib/refrepo/gen/wiki/generators/hardware.rb
index c2981f5345223b339cf6c226abe042247ce10cb3..5f7c790cde687d93ecf055b19426a605d068f665 100644
--- a/lib/refrepo/gen/wiki/generators/hardware.rb
+++ b/lib/refrepo/gen/wiki/generators/hardware.rb
@@ -354,6 +354,7 @@ class G5KHardwareGenerator < WikiGenerator
       'Skylake' => '2016',
       'Zen' => '2017',
       'Zen 2' => '2019',
+      'Zen 3' => '2020',
       'Cascade Lake-SP' => '2019',
       'Vulcan' => '2018',
       'Ice Lake' => '2021',
diff --git a/lib/refrepo/input_loader.rb b/lib/refrepo/input_loader.rb
index e9ff1d30ba2f61d11fdb5b403a4bb96add82ec77..ade63f9756f6f35daccf51389969c3e6c6957802 100644
--- a/lib/refrepo/input_loader.rb
+++ b/lib/refrepo/input_loader.rb
@@ -682,7 +682,7 @@ def get_flops_per_cycle(microarch, cpu_name)
     return 4
   when "Sandy Bridge", "Zen", "Vulcan"
     return 8
-  when "Haswell", "Broadwell", "Zen 2"
+  when "Haswell", "Broadwell", "Zen 2", "Zen 3"
     return 16
   when "Ice Lake"
     return 32