Thanks a lot for your quick answers!

The audio format is not a problem because no audio at all can be played from the SSD. I tried many different video formats including mpeg 1 and quicktime video which work well on the SCSI drive.

The SATA card is on the top (highest) PCI slot so I will try moving it down to a lower one. There are 6 slots so I will try them all and let you know how it goes!