Just curious, is there really any noticeable benefit to using RAID 0 striping on SSD's (as opposed to a single SSD)?
In normal, real world use, probably not... but it didn't stop me from doing almost the same! Same pair of 120GB Sandforce drives on Intel controller, just mine are Corsair Force 3s. So far no issues at all.
Atto bench mark will give me some scores that are double a single drive but some others are rather less convincing.
I would suggest that generally a single 240GB SSD would be preferable. SSD performance scales with capacity (more or less) so a single 240GB drive is usually significantly faster than 120GB drive, and you avoid and RAID headaches and less chance of failure.[Obviously I'm generalising like crazy here but if you look up reviews with real-world tests the bigger drives are faster.
The main reason I got the drives I got is that they were much cheaper than anything else comparable, and significantly less than 240GB of the same model!
Going back the OP, a drive dropping out of the array will cause the array to fail and Windows to lose it's boot drive, which will give you a blue screen crash. Sometimes some of the info on the blue screen helps, if a driver file is mentioned or an error code that can be Google'd.
I would check your data/power cables and back up your data ASAP.
Windows Backup can create an Image of the boot drive and create a recovery CD/DVD that you can boot from and recover the image to save reinstalling everything etc, if you have no other drive imaging software I would do this too.
I would say it's most likely to be the SSD and not the motherboard etc. Removing any over-clock (if you have) and swapping SATA cables is worth a try too.
You maybe able to RMA your SSD on the current evidence or you may need to wait for it to get worse before you can get it replaced.
If small enough data size you could restore the image to a single SSD so you're not with out your PC functioning.
[leave SATA in RAID mode and remove any array config so can access the single drive]
Hope this helps, Seb