diff --git a/oem/oem_nvr/RkLunch.sh b/oem/oem_nvr/RkLunch.sh
index bb9a4c9..4a1bcd9 100755
--- a/oem/oem_nvr/RkLunch.sh
+++ b/oem/oem_nvr/RkLunch.sh
@@ -1,3 +1,4 @@
 #!/bin/sh
 #
 # start nvr app 
+echo 600000000 > sys/kernel/debug/clk/clk_gpu/clk_rate