SATA terminology

Are the terms SATA II, SATA 3Gb/s and SATA 300 synonymous?
If I install a HDD with one of these designations on an Intel D945PSLKR MoBo (BIOS Intel Corp. SN94510J,86A.0096.2006.0822.1131,8/22/2006) should I set the SATA mode in the BIOS to AHCI?
The options are: IDE, AHCI and RAID; I will not be using a RAID configuration.