Check the MAC address label on your motherboard. The MAC address , composed of 12 numbers and letters, is printed in black on a white sticker with barcode. Please refer to the following picture.
Download the MAC tool from ASRock website and extract the files.
Save the MAC tool to a DOS-bootable USB flash drive.
Reboot your system and press the F11 hotkey on the keyboard during POST to boot into the USB flash drive.
Key in the command “mac c [MAC address]” and press Enter. The system will re-flash the MAC address automatically. *If your motherboard supports dual LAN, please key in “mac c [MAC address] [MAC address]”.
After application is finished, please refer to below steps to check the MAC address in Windows. Computer → Control panel → Network and internet → View network status and tasks → Local area connection → Details → Physical address