diff --git a/src/tuxedo_io/tuxedo_io.c b/src/tuxedo_io/tuxedo_io.c
index 6955d51..24714fe 100644
--- a/src/tuxedo_io/tuxedo_io.c
+++ b/src/tuxedo_io/tuxedo_io.c
@@ -251,9 +251,9 @@ static int uw_get_tdp_min(u8 tdp_index)
 	if (tdp_index > 2)
 		return -EINVAL;
 
-	if (dmi_string_in(DMI_PRODUCT_SERIAL, "PH4TUX")) {
+	if (uw_feats->model == 0x13) {
 		tdp_min = tdp_min_ph4tux[tdp_index];
-	} else if (dmi_string_in(DMI_PRODUCT_SERIAL, "PH4TRX")) {
+	} else if (uw_feats->model == 0x12) {
 		tdp_min = tdp_min_ph4trx[tdp_index];
 	} else if (dmi_string_in(DMI_PRODUCT_SERIAL, "PH4TQX")) {
 		tdp_min = tdp_min_ph4tqx[tdp_index];
@@ -278,9 +278,9 @@ static int uw_get_tdp_max(u8 tdp_index)
 	if (tdp_index > 2)
 		return -EINVAL;
 
-	if (dmi_string_in(DMI_PRODUCT_SERIAL, "PH4TUX")) {
+	if (uw_feats->model == 0x13) {
 		tdp_max = tdp_max_ph4tux[tdp_index];
-	} else if (dmi_string_in(DMI_PRODUCT_SERIAL, "PH4TRX")) {
+	} else if (uw_feats->model == 0x12) {
 		tdp_max = tdp_max_ph4trx[tdp_index];
 	} else if (dmi_string_in(DMI_PRODUCT_SERIAL, "PH4TQX")) {
 		tdp_max = tdp_max_ph4tqx[tdp_index];
diff --git a/src/uniwill_interfaces.h b/src/uniwill_interfaces.h
index 409319c..c161d26 100644
--- a/src/uniwill_interfaces.h
+++ b/src/uniwill_interfaces.h
@@ -47,6 +47,7 @@ struct uniwill_interface_t {
 };
 
 struct uniwill_device_features_t {
+	u8 model;
 	/**
 	 * Identification for uniwill_power_profile_v1
 	 *
diff --git a/src/uniwill_keyboard.h b/src/uniwill_keyboard.h
index fb0ed3a..518130f 100644
--- a/src/uniwill_keyboard.h
+++ b/src/uniwill_keyboard.h
@@ -185,6 +185,11 @@ EXPORT_SYMBOL(uniwill_get_active_interface_id);
 struct uniwill_device_features_t *uniwill_get_device_features(void)
 {
 	struct uniwill_device_features_t *uw_feats = &uniwill_device_features;
+	u32 status;
+
+	status = uniwill_read_ec_ram(0x0740, &uw_feats->model);
+	if (status != 0)
+		uw_feats->model = 0;
 
 	uw_feats->uniwill_profile_v1_two_profs = false
 		|| dmi_match(DMI_BOARD_NAME, "PF5PU1G")
@@ -223,8 +228,8 @@ struct uniwill_device_features_t *uniwill_get_device_features(void)
 	// Device check for two configurable TDPs
 	uw_feats->uniwill_tdp_config_two = false
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 18, 0)
-		|| dmi_string_in(DMI_PRODUCT_SERIAL, "PH4TUX")
-		|| dmi_string_in(DMI_PRODUCT_SERIAL, "PH4TRX")
+		|| uw_feats->model == 0x13
+		|| uw_feats->model == 0x12
 		|| dmi_string_in(DMI_PRODUCT_SERIAL, "PH4TQX")
 #endif
 	;