It is recommendable to install Intel® Rapid Storage Technology when having the chipset mode set as RAID.
Based on the description you provided, I recommend you installing the version 11.7 for testing purposes since you have tested already version 12.5 and 12.0.
You can download the version at the following link:
Another good steps is to test a clean installation and installing all Intel® drivers and Asus driver but not installing the Windows* updates.
just tried 11.7 and makes win7 crash again, same as 12.5, safe mode crash and reset as well, but I successfully get into win7 by boot menu last good hardware config (something like that, my win7 is not english version) and confirm when into windows, service without IRST service.
P.S. all test done without win 7 updates, without service pack, without anti-virus or internet security. basicly it's a clean installed win 7