diff --git a/src/mainboard/system76/adl/variants/darp8/overridetree.cb b/src/mainboard/system76/adl/variants/darp8/overridetree.cb
index 560dc47698..196a7bc2a4 100644
--- a/src/mainboard/system76/adl/variants/darp8/overridetree.cb
+++ b/src/mainboard/system76/adl/variants/darp8/overridetree.cb
@@ -1,4 +1,6 @@
 chip soc/intel/alderlake
+	register "s0ix_enable" = "1"
+
 	register "power_limits_config[ADL_P_282_482_28W_CORE]" = "{
 		.tdp_pl1_override = 20,
 		.tdp_pl2_override = 56,
diff --git a/src/mainboard/system76/rpl/variants/darp9/overridetree.cb b/src/mainboard/system76/rpl/variants/darp9/overridetree.cb
index 0e4c1a9049..25aa8739f4 100644
--- a/src/mainboard/system76/rpl/variants/darp9/overridetree.cb
+++ b/src/mainboard/system76/rpl/variants/darp9/overridetree.cb
@@ -1,4 +1,6 @@
 chip soc/intel/alderlake
+	register "s0ix_enable" = "1"
+
 	register "power_limits_config[RPL_P_682_482_282_28W_CORE]" = "{
 		.tdp_pl1_override = 20,
 		.tdp_pl2_override = 56,