diff --git a/data/grid5000/sites/sophia/clusters/esterel27/nodes/esterel27-1.json b/data/grid5000/sites/sophia/clusters/esterel27/nodes/esterel27-1.json
index 16e5fcd3d52776d635846084c02356a6f4635c06..804164a4a9fcfaf3dfd6ee121120c085187e3c6d 100644
--- a/data/grid5000/sites/sophia/clusters/esterel27/nodes/esterel27-1.json
+++ b/data/grid5000/sites/sophia/clusters/esterel27/nodes/esterel27-1.json
@@ -93,6 +93,7 @@
       "compute_capability": "6.1",
       "cores": 3584,
       "cpu_affinity": 0,
+      "cpu_affinity_override": 1,
       "device": "/dev/nvidia4",
       "memory": 11811160064,
       "microarchitecture": "Pascal",
@@ -110,6 +111,7 @@
       "compute_capability": "6.1",
       "cores": 3584,
       "cpu_affinity": 0,
+      "cpu_affinity_override": 1,
       "device": "/dev/nvidia5",
       "memory": 11811160064,
       "microarchitecture": "Pascal",
@@ -127,6 +129,7 @@
       "compute_capability": "6.1",
       "cores": 3584,
       "cpu_affinity": 0,
+      "cpu_affinity_override": 1,
       "device": "/dev/nvidia6",
       "memory": 11811160064,
       "microarchitecture": "Pascal",
@@ -144,6 +147,7 @@
       "compute_capability": "6.1",
       "cores": 3584,
       "cpu_affinity": 0,
+      "cpu_affinity_override": 1,
       "device": "/dev/nvidia7",
       "memory": 11811160064,
       "microarchitecture": "Pascal",
diff --git a/input/grid5000/sites/sophia/clusters/esterel27/esterel27.yaml b/input/grid5000/sites/sophia/clusters/esterel27/esterel27.yaml
index ba23e4d51898df27ac80f914f49b32cf4699dd20..24ed7aa4749f5d25f2c9fa83d89a18cc34790df4 100644
--- a/input/grid5000/sites/sophia/clusters/esterel27/esterel27.yaml
+++ b/input/grid5000/sites/sophia/clusters/esterel27/esterel27.yaml
@@ -9,6 +9,15 @@ queues:
   - testing
 nodes:
   esterel27-1:
+    gpu_devices:
+      nvidia4:
+        cpu_affinity_override: 1
+      nvidia5:
+        cpu_affinity_override: 1
+      nvidia6:
+        cpu_affinity_override: 1
+      nvidia7:
+        cpu_affinity_override: 1
     chassis:
       manufactured_at: 2019-01-01
       warranty_end: 2021-06-07