diff --git a/data/grid5000/sites/lyon/clusters/orion/nodes/orion-1.json b/data/grid5000/sites/lyon/clusters/orion/nodes/orion-1.json
index ab93890632105a7d39e190360f3140ebafc7a648..e4314c7013d911531bd618e72c6e449a404727f9 100644
--- a/data/grid5000/sites/lyon/clusters/orion/nodes/orion-1.json
+++ b/data/grid5000/sites/lyon/clusters/orion/nodes/orion-1.json
@@ -21,7 +21,7 @@
     "gpu_vendor": "Nvidia"
   },
   "main_memory": {
-    "ram_size": 34359738368,
+    "ram_size": 33285996544,
     "virtual_size": null
   },
   "monitoring": {
diff --git a/data/grid5000/sites/lyon/clusters/orion/nodes/orion-2.json b/data/grid5000/sites/lyon/clusters/orion/nodes/orion-2.json
index 4483ec7ca8df92ff6c315a25316f7ea67454bee1..3cd773e17fff623fa14f3786070fd04cd4dbea4c 100644
--- a/data/grid5000/sites/lyon/clusters/orion/nodes/orion-2.json
+++ b/data/grid5000/sites/lyon/clusters/orion/nodes/orion-2.json
@@ -21,7 +21,7 @@
     "gpu_vendor": "Nvidia"
   },
   "main_memory": {
-    "ram_size": 34359738368,
+    "ram_size": 33285996544,
     "virtual_size": null
   },
   "monitoring": {
diff --git a/data/grid5000/sites/lyon/clusters/orion/nodes/orion-3.json b/data/grid5000/sites/lyon/clusters/orion/nodes/orion-3.json
index 220fc09b776b4f39f3fe4d2e65c4c50240bbe7a7..dc7f853733f54fae38f5562851dfb79f59645dee 100644
--- a/data/grid5000/sites/lyon/clusters/orion/nodes/orion-3.json
+++ b/data/grid5000/sites/lyon/clusters/orion/nodes/orion-3.json
@@ -21,7 +21,7 @@
     "gpu_vendor": "Nvidia"
   },
   "main_memory": {
-    "ram_size": 34359738368,
+    "ram_size": 33285996544,
     "virtual_size": null
   },
   "monitoring": {
diff --git a/data/grid5000/sites/lyon/clusters/orion/nodes/orion-4.json b/data/grid5000/sites/lyon/clusters/orion/nodes/orion-4.json
index b24135e5d7ac5bcaa56d86fd2e122c208f8eaa0d..cade033d2bb3692e3e71091305fc6d6f36411592 100644
--- a/data/grid5000/sites/lyon/clusters/orion/nodes/orion-4.json
+++ b/data/grid5000/sites/lyon/clusters/orion/nodes/orion-4.json
@@ -21,7 +21,7 @@
     "gpu_vendor": "Nvidia"
   },
   "main_memory": {
-    "ram_size": 34359738368,
+    "ram_size": 33285996544,
     "virtual_size": null
   },
   "monitoring": {