Enable Intel Rapid Storage Technology in BIOS?

[SC489]

Is there any advantage enabling and using the IRST driver for my main NVME SSD drive using an Asus Z790 board? I guess I would have to enable IRST in the BIOS then select the option Map PCIE Storage Under VMD? There is also an option to Map SATA Controller Under VMD which I don't understand.

 

[Daytrader]

I have that board also, some people say disable VMD unless using raid, others say enabled vmd, on my board its enabled by default, what did you choose in the end, i think i am going disabled myself, thx