First thing I do when I find a problem like this is check the RAM with Memtest86. Test the ram from a cold start and leave it running for at least 6 cycles. http://www.memtest.org/
If no RAM errors are detected I’d do the following:
· Check the event view for error messages
· Make sure the bios is up-to-date
· Remove all other SATA drives or optical drives apart from the SSD
If none of that works swap the SSD to the Sil5723 controller (performance will suck but it will help to isolate the problem).