No, you generally have to enable RAID in the bios, which will not affect an SSD that is not part of an array. AHCI is a subset of RAID and with a single SSD RAID will be the same as using AHCI.
You could also just use software RAID in Windows disk management: http://www.howtogeek.com/howto/36504/how-to-create-a-software-raid-array-in-windows-7/