SSD RAID 0 without reinstalling Windows 8.1

[Technocrat_13]

I have a 1TB hard drive partitioned to 250 gigs to store my OS, I'll be getting 2 SSDS (256 GB X2). So I need to set up Raid 0 for the OS. This will be the first time so I need so me help. Thanks.
Motherboard- gigabyte z97x extreme gaming 3 (yes it's supports RAID.

 

[geofelt]

Buy a single 500gb ssd instead.
It will be simpler, cheaper, safer and perform just as well.
Raid-0 has been over hyped as a performance enhancer.
Sequential benchmarks do look wonderful, but the real world does not seem to deliver the indicated performance benefits for most
desktop users. The reason is, that sequential benchmarks are coded for maximum overlapped I/O rates.
It depends on reading a stripe of data simultaneously from each raid-0 member, and that is rarely what we do.
The OS does mostly small random reads and writes, so raid-0 is of little use there.
There are some apps that will benefit. They are characterized by reading large files in a sequential overlapped manner.