diff --git a/src/mainboard/google/dedede/variants/galtic/overridetree.cb b/src/mainboard/google/dedede/variants/galtic/overridetree.cb
index 150bfe3331..8004736d31 100644
--- a/src/mainboard/google/dedede/variants/galtic/overridetree.cb
+++ b/src/mainboard/google/dedede/variants/galtic/overridetree.cb
@@ -67,6 +67,9 @@ chip soc/intel/jasperlake
 
 	register "tcc_offset" = "8"     # TCC of 97C
 
+	# Core Display Clock Frequency selection
+	register "cd_clock" = "CD_CLOCK_172_8_MHZ"
+
 	device domain 0 on
 		device pci 04.0 on
 			# Default DPTF Policy for all Dedede boards if not overridden