SuperOwl,
Somebody at work who likes to play jokes on people says that a SCSI would actually improve the way my PC works as all the main components would be effectively connected to one hub.
He is joking in this case - it's complete horses**t!
Here's a definition of SCSI: Acronym for Small Computer Systems Interface. Pronounced "scuzzy."
"An intelligent interface device that expands a microprocessor (CPU) bus to facilitate connections to multiple internal and / or external peripherals (e.g. Tape drives, CD-ROM drives, hard drives, scanners) and exchange data with those peripherals via a separate communications bus.
The original SCSI was capable of supporting up to 7 devices at a data rate of 5 Mb/s over an 8-bit parallel bus. Subsequent SCSI versions feature parallel communications buses having greater width and speed.
Since SCSI exchanges data with the peripherals over a separate communications bus rather than the processor bus, the CPU can devote the saved processing time to other tasks."
It is an alternative data communications bus to IDE that was vastly superior in size of devices and speed compared with the original IDE spec. As Richard says, for PCs (rather than big servers or large storage arrays) SATA is the way to go now.
Until USB, most scanners only had SCSI interfaces.
If you need a SCSI card to talk to your digital recording studio, fine.
But unless you also plan to replace your IDE hard disks, CD / DVD etc., with SCSI equivalents, it will have no impact on your system performance whatsoever (other than allowing you to communicate with your recording studio.
SD