Area 51 R6, cannot enable UEFI secure boot

Hi...the machine is with AMD 1950x it's quite strange that I cannot enable UEFI secure boot in my BIOS... all secure boot related settings are greyed out. Is there anything I am missing? And ...The service tag on this motherboard is still blank, does it matter?

The first 4 options are greyed out.

No change Boot methods here..