diff --git a/src/mainboard/google/mancomb/variants/baseboard/devicetree.cb b/src/mainboard/google/mancomb/variants/baseboard/devicetree.cb
index 9bf52c7fa1..ab5ade728c 100644
--- a/src/mainboard/google/mancomb/variants/baseboard/devicetree.cb
+++ b/src/mainboard/google/mancomb/variants/baseboard/devicetree.cb
@@ -1,6 +1,8 @@
 # SPDX-License-Identifier: GPL-2.0-or-later
 chip soc/amd/cezanne
 
+	register "system_configuration" = "3"
+
 	# eSPI Configuration
 	register "common_config.espi_config" = "{
 		.std_io_decode_bitmap = ESPI_DECODE_IO_0x80_EN | ESPI_DECODE_IO_0X60_0X64_EN,
diff --git a/src/mainboard/google/mancomb/variants/mancomb/overridetree.cb b/src/mainboard/google/mancomb/variants/mancomb/overridetree.cb
index 891b4ebf0b..ef52ac0788 100644
--- a/src/mainboard/google/mancomb/variants/mancomb/overridetree.cb
+++ b/src/mainboard/google/mancomb/variants/mancomb/overridetree.cb
@@ -1,4 +1,12 @@
 chip soc/amd/cezanne
+
+	register "slow_ppt_limit_mW"         = "37500"
+	register "fast_ppt_limit_mW"         = "48000"
+	register "slow_ppt_time_constant_s"  = "5"
+	register "stapm_time_constant_s"     = "275"
+	register "sustained_power_limit_mW"  = "25000"
+	register "thermctl_limit_degreeC"    = "100"
+
 	device domain 0 on
 	end # domain