"On Raid-0 The information is split equaly between them so 2X16GB = Estimate 30GB fully formatted + Windows7 = 10GB left, which is really enough for what i would like because i also have a 250GB Seagate, SATA-II HDD"
And why you may possibly want to do this?
If you install only your windows there, then your beloved games will not benefit from fast loading and your weird stipe will just no matter at all once Windows is loaded /started/.
If you are planning to place there also your windows swap file - as good it may sound, as bad idea is it actually for many reasons - frequent writing in the windows swap will kill your SSD in few years at max, and this only if you use your PC just an hour a day, if you use it intensively it may kill your SSD even in months, if instead you configure your windows to work swapless - meaning no swap file, you'll first of all make it to run considerably faster, it will not be necessary to care for securing these extra few GB on the system disk for the swap file, and if you use your PC for nothing much as for gaming you can do this safely on just 4GB, if you realy need swap file for something else, besides windows itself, like software, who use its own swap file and there's no option to change this /and the games are not among these softwares, for SC2 I very well know it's running flawless on a swapless system/, then the right thing is to have at least 8GB of RAM, make a virtual drive there for the swap file and this this virtual drive will EAT any possible, no ANY IMAGINABLE SSD stripe, even if you make a strip of 6 SSD, no, even of a 10000 SSDs /as you should multiplex them/ it will make cirkles around these SSDs with its bottom on the front, as it is just literaly thousands of times faster.
In short - put this SSD in to the trash can, configure your windows for not using a swap file, play your games at light speed without ever carying at all about the "not enough space to install windows"