If you've checked each stick individually with Memtest ( http://www.memtest.org/
), then my first assumption would be a faulty board. Unless you made changes in BIOS that are making the system unstable. The board should have no issue with that much RAM. If the board works fine with 2 x 8GB, but chokes with 4 x 8GB... I'd bet on the board being bad.
Btw, here is a good tutorial for fresh installing Win7 with a SSD.http://www.overclock.net/t/1156654/seans-windows-7-install-guide-optimization-for-ssds-hdds