The A770M-a has 4 sata ports. I am using 2, 3 And number 4. User's guide makes no mention of drivers for AHCI, I have ATI v7.1 (1-10-2007) JMICRON Raid driver v1.17.17.00 (4-17-2007). Have been running as IDE since I built the system July 2008. OS is WindowsXP SP3. Need AHCI drivers