Upgrading an OptiPlex 360 I have at home for casual use (4gb RAM, Win 7 64, Crucial M500 SSD)

I have not installed the SSD yet, and had just assumed this machine would be able to use AHCI. No setting available in Bios but I know many Dell PC's will automatically detect/set to AHCI.

Can I use AHCI mode with this machine ? (chipset P35/G33/G31,  Southbridge 82801GB ICH7/R)

 

Thanks