I bought an Adaptec 29160N on Ebay which is described as a 32 bit PCI card with a transfer rate up to 160mb per second with drivers for W7 64 bit, so it should work with the UD5. I've used SCSI drives as my boot drive since they are incredibly reliable, great performers and I like the ability to perform a low level format from the SCSI utility. Thanks for the reply.