AHCI to Raid 0

So i got these new Kingston 120 GB SSDs and I wanted to merge them to a Raid 0.

My prob now... I can't migrate my windows 8.1 AHCI partition to my SSDs / Windows

wont boot ( Errors ). Any tips? I dont want to reinstall - Do i have to?

Board : Asus P9X79 WS

SSDs : Kingston SSD Now 120 GB ( 2x )

SSD : Samsung 840 Evo 120 GB - atm for OS, later for cachingĀ 

Thanks in advance

I personally have never seen a conversion from one drive to 2 RAID0 drives. Not saying it cannot be done, but I think it may be easier to just reinstall. And I know how much fun that can be.