Can someone post a link to the ACPI driver for the V1? I can't seem to find it, and I too have the unknown device in device manager.

Also, I was looking at the drivers on Asus' website, and it seems that there are Marvell SATA drivers. I have never installed any Marvell SATA drivers, because I thought that the SATA ports were from the ICH10R... no? It seems to work fine without them, are they really needed?