Hahaha My HDD is set to IDE always and always working on IDE (first position). AHCI is not for my motherboard because there is no drivers to windows 7 to this mobo. And my performance is much higher on IDE if you compare it with AHCI (strange I know, but I feel the difference when I work).
And my Mobo has no FireWire I have no device on FireWire too
EDIT: But I will try to switch to AHCI to test it