Try downloading AS SSD benchmark. Run the program and it will display the driver used (should be iaStor, not msahci) and it will display alignment info and a OK if correct. Do not need to run the benchmarking to get info, just open program.
In addition to the RST matrix driver which is what LoardContrad identified (I think), you may also need to down load the F6 driver (use correct version, 32 bit or 64 bit).
I had to do a re-install to get the correct ahci driver to load. If this is the case then you have to do a custom install. On the page where you select which partition to install to there is a little check box (lower left) that needs to be checked, then broose to thumbdrive where you copied the "F6" driver to.
PS Tried googling, but intel website appears screwed up!