I'm about to do a fresh install on desktop and I have a question about IDE vs. AHCI. Which mode should I pick in the bios? IDE, AHCI or RAID? Does AHCI have any advantages over IDE? My HDD right now ...

I have a Thinkpad T410s on which I installed Windows 7 Pro SP1, most of the TP drivers, some apps and preferences. The problem is that before I installed Windows, I didn't realize the hardware setup ...