diff --git a/src/mainboard/google/stout/devicetree.cb b/src/mainboard/google/stout/devicetree.cb
index 97db8ae..6c693ad 100644
--- a/src/mainboard/google/stout/devicetree.cb
+++ b/src/mainboard/google/stout/devicetree.cb
@@ -20,6 +20,8 @@
 	register "gpu_cpu_backlight" = "0x1155"
 	register "gpu_pch_backlight" = "0x06100610"
 
+	register "max_mem_clock_mhz" = "666"
+
 	device cpu_cluster 0 on
 		chip cpu/intel/socket_rPGA989
 			device lapic 0 on end