diff --git a/OPENCORE/EFI/OC/ACPI/SSDT-PMC.aml b/OPENCORE/EFI/OC/ACPI/SSDT-PMC.aml
new file mode 100644
index 0000000..479c43a
Binary files /dev/null and b/OPENCORE/EFI/OC/ACPI/SSDT-PMC.aml differ
diff --git a/OPENCORE/EFI/OC/config.plist b/OPENCORE/EFI/OC/config.plist
index 222ae43..cd3b882 100644
--- a/OPENCORE/EFI/OC/config.plist
+++ b/OPENCORE/EFI/OC/config.plist
@@ -14,6 +14,14 @@
 	<dict>
 		<key>Add</key>
 		<array>
+			<dict>
+				<key>Comment</key>
+				<string>PMCR for native 300-series NVRAM</string>
+				<key>Enabled</key>
+				<true/>
+				<key>Path</key>
+				<string>SSDT-PMC.aml</string>
+			</dict>
 			<dict>
 				<key>Enabled</key>
 				<true/>
@@ -1674,7 +1682,7 @@
 				<key>SystemAudioVolume</key>
 				<data>Rg==</data>
 				<key>boot-args</key>
-				<string>-v debug=0x100 keepsyms=1 alcid=1 -radcodec unfairgva=1</string>
+				<string>-v debug=0x100 keepsyms=1 alcid=1 npci=0x3000 -radcodec unfairgva=1</string>
 				<key>csr-active-config</key>
 				<data>AAAAAA==</data>
 				<key>prev-lang:kbd</key>