I was not able to find a real answer for my problem so hopefully i word it correctly. So I reformatted so i could enable AHCI mode and add a new SSD. Here is my issue I plugged only my 64GB crucial M4 ssd and sata DVD rom, switched to AHCI mode in bios boom bios loads AHCI modes and proceed to install windows 7. So now I add my new Crucial M500 240gb and now the computer hangs at loading os screen and goes no further. But if I put the M500 in slots 4-5 in IDE mode computer starts no problem boots into windows. I see there are marvel controller drivers for my Mobo (Gigabyte 990fx ud3 rev 1.1) but when I download then they are not .exe, they are boot drivers so do I need these drivers? can I install them after I have already reformatted.