It should be this one:
ICH9R/DO/DH SATA AHCI controller
if you try it and oyu stild get BSOD it could be because of the floopy drive you are using.
in case you already have windows installed , try reading up on this forum : http://forums.pcper.com/showthread.php?t=444831 it has some ideas on how to activate ahci after you already installed windows.
I didnt bother sofar, nobody proved yet that for normal desktop use ahci mode performs better then IDE mode( in fact achi might even be slower a few % i read )