I have a msi 890gxm-g65 motherboard i have a sata 3 Samsung 128gb drive. WHen i put my board into achi before doing a new install many times it goes to no bootable device if i put it back to raid or ide it works fine. Its fusterating my because i can not get it to work. It installs the operating system then says no bootable device. Im so confussed.
Windows 7 Ultimate 64
16gb of ddr3 pc1600
Amd X6 1900t oc to 3.9ghz
easy try this on ide run fix it http://support.microsoft.com/kb/922976
then boot into ahci