HM86 Chipset SATA RAID support

Hello!

I've just bought an Asus G551JW (Intel HM86 Chipset) laptop, including a 1 TB HDD with a 24 SSD for cache. I flashed the newest BIOS and have installed windows 8.1 in UEFI mode.

I would like to set up the Rapid Storage Technology, but there's no RAID option for the SATA controller in the BIOS.

The official page of the HM86 Chipset states, that it supports the IRST.

Does the HM86 Chipset have RAID support and if not, why does the page states that the chipset supports the technology?

Thanks!