Why does my SATA drive show up as SCSI?

I have an HP desktop computer running WIndows 7. The motherboard has an nVidia chipset. I also have 2 standard SATA hard drives and a SATA SSD drive attached. When I bring up Device Manager, all of the drives are listed as SCSI drives. Anyone know if there are any driver updates that can fix this? I'm not really worried that they are mislabeled, but the SSD is not performing well, even after the typical tweaks. In fact, one of the tweak applications can't identify the drive mode. It should either be IDE or AHCI. In any case, NOT SCSI. My BIOS doesn't have any settings to change IDE/AHCI modes, so I have been told this needs to be done through software.

Any suggestions?

Maybe the driver for the controller determines what the OS sees.
all my drives list as ATA

My SATA II drive shows up as ATA as well.