diff --git a/definition_driver/knobs/AMD_CpuVidBoost.txt b/definition_driver/knobs/AMD_CpuVidBoost.txt
new file mode 100644
index 0000000..f1a2bb5
--- /dev/null
+++ b/definition_driver/knobs/AMD_CpuVidBoost.txt
@@ -0,0 +1,10 @@
+//#description
+The value represents the VID of each core with active core boost frequencies.
+//#device
+MSR
+//#register_index
+0xc0010293
+//#bit_mask
+0x3FC000
+//#processor_groups
+amd_ryzen