Intel Motherboards : iRST enable/disable

I was also wondering why was my motherboard not letting me change the setting. After reading the manual I found out that I had SATA mode still set to IDE. After changing it to AHCI, I was gained control over the setting. Just letting you and everyone else know in case if someone had a similar issue.

I wanted to enable Rapid Start but I didn't check it further - seems like it's abandoned by Intel, and there's no driver for Windows 10. Which makes me thinking why is there a Rapid Start Utility on ASRock P67 Pro3's download section for WX...