Get the 29160, not the 29160N, the 29160N is the same as the 19160 except it has drivers for other OSes. The 29160 is the best card to get, gives you the best options, features, and performance.It has 2 68pin internal connectors-1 68pin LVD and 1 68pin LVD/SE, 1 50pin Internal connector, and 1 68pin external. The 19160 and the 29160N only have 1 68pin Internal LVD/SE, 1 50pin Internal Narrow, and 1 68pin External. The extra 68pin Internal really helps whhen you have U160, Ultra2, Wide and Narrow all on the same card, all of your devices will run at full speed because the 29160 is the only card out of the 3 that has SpeedFlex technology whic keeps all of the buses seperate.I use the 29160 and 39160 on ALL of my systems, check out the specs in the link to my system rigs, I live and breathe all SCSI.