diff --git a/doc/tutorials/gpu-passthru.rst b/doc/tutorials/gpu-passthru.rst
index 8ddeba946..09b752d38 100644
--- a/doc/tutorials/gpu-passthru.rst
+++ b/doc/tutorials/gpu-passthru.rst
@@ -26,6 +26,8 @@ Consider the following dependencies and constraints:
 
 * When a device is assigned to a VM via GVT-d, no other VMs can use it.
 
+* For ADL-ASRock board, need disable BIOS setting "Above 4G Decoding"(under Advanced Menu -> SA Configuration) to enable GVT-d feature.
+
 .. note:: After GVT-d is enabled, have either a serial port
    or SSH session open in the Service VM to interact with it.