diff --git a/runners/launch_mi300x-amds.sh b/runners/launch_mi300x-amds.sh
index 20addccf43..4f085d0ad9 100644
--- a/runners/launch_mi300x-amds.sh
+++ b/runners/launch_mi300x-amds.sh
@@ -9,7 +9,10 @@ LOCK_FILE="${SQUASH_FILE}.lock"
 
 set -x
 
-JOB_ID=$(salloc --partition=$PARTITION --gres=gpu:$TP --cpus-per-task=256 --time=180 --no-shell --job-name="$RUNNER_NAME" 2>&1 | tee /dev/stderr | grep -oP 'Granted job allocation \K[0-9]+')
+# Pin to the known-good mi300x nodes; others are unavailable:
+#   chi-mi300x-033, chi-mi300x-037: down (Not responding)
+#   chi-mi300x-049:                  drained (persistent /nvme_home disk-full)
+JOB_ID=$(salloc --partition=$PARTITION --nodelist=chi-mi300x-[034-036,054,057-058].ord.vultr.cpe.ice.amd.com --gres=gpu:$TP --cpus-per-task=256 --time=180 --no-shell --job-name="$RUNNER_NAME" 2>&1 | tee /dev/stderr | grep -oP 'Granted job allocation \K[0-9]+')
 
 if [ -z "$JOB_ID" ]; then
     echo "ERROR: salloc failed to allocate a job"