diff --git a/src/mainboard/system76/rpl/variants/addw3/overridetree.cb b/src/mainboard/system76/rpl/variants/addw3/overridetree.cb
index 6095b11084..32e1b41f75 100644
--- a/src/mainboard/system76/rpl/variants/addw3/overridetree.cb
+++ b/src/mainboard/system76/rpl/variants/addw3/overridetree.cb
@@ -1,4 +1,7 @@
 chip soc/intel/alderlake
+	# Support 5200 MT/s memory
+	register "max_dram_speed_mts" = "5200"
+
 	device domain 0 on
 		subsystemid 0x1558 0xa671 inherit
 
diff --git a/src/mainboard/system76/rpl/variants/bonw15/overridetree.cb b/src/mainboard/system76/rpl/variants/bonw15/overridetree.cb
index 88bba58d87..cb6193470b 100644
--- a/src/mainboard/system76/rpl/variants/bonw15/overridetree.cb
+++ b/src/mainboard/system76/rpl/variants/bonw15/overridetree.cb
@@ -1,4 +1,7 @@
 chip soc/intel/alderlake
+	# Support 5200 MT/s memory
+	register "max_dram_speed_mts" = "5200"
+
 	device domain 0 on
 		subsystemid 0x1558 0x3702 inherit
 
diff --git a/src/mainboard/system76/rpl/variants/serw13/overridetree.cb b/src/mainboard/system76/rpl/variants/serw13/overridetree.cb
index 140f5e7ea7..123ae3928d 100644
--- a/src/mainboard/system76/rpl/variants/serw13/overridetree.cb
+++ b/src/mainboard/system76/rpl/variants/serw13/overridetree.cb
@@ -1,4 +1,7 @@
 chip soc/intel/alderlake
+	# Support 5200 MT/s memory
+	register "max_dram_speed_mts" = "5200"
+
 	device domain 0 on
 		subsystemid 0x1558 0xd502 inherit