Hi there Blasphemy_,
You could check this one:
http://www.msi.com/product/nb/ge70-2oe.html#hero-overvi...
It says: 'Two mSATA SSDs and one HDD can be installed in the same laptop without the need to expand the size of the laptop, increasing read, write, and saving speeds.' Though, below it says that 'Only in two mSATA SSD RAID 0 (256GB) units'.
It is a little strange. I would recommend you to contact the msi support and ask them just to be sure.
Hope this helped,
D_Know_WD