diff --git a/src/proc.sh b/src/proc.sh
index 0b922fd..6a865ea 100644
--- a/src/proc.sh
+++ b/src/proc.sh
@@ -9,9 +9,14 @@ set -Eeuo pipefail
 : "${CPU_MODEL:=""}"
 : "${DEF_MODEL:="neoverse-n1"}"
 
-if [[ "$CPU" == "Cortex A55" ]] || [[ "${SYS,,}" == *"-rk35xx" ]]; then
-  # Pin to big cores on Rockchip Orange Pi 5
-  CPU_PIN="4,5,6,7"
+if [[ "$CPU" == "Cortex A53" ]] && [[ "$CORES" == "6" ]]; then
+  # Pin to performance cores on Rockchip Orange Pi 4
+  [ -z "$CPU_PIN" ] && CPU_PIN="4,5"
+fi
+
+if [[ "$CPU" == "Cortex A55" ]] && [[ "$CORES" == "8" ]]; then
+  # Pin to performance cores on Rockchip Orange Pi 5
+  [ -z "$CPU_PIN" ] && CPU_PIN="4,5,6,7"
 fi
 
  if [[ "${ARCH,,}" != "arm64" ]]; then