Compared with the Parallel ATA Serial ATA has more advantages as listed below :

• Lower voltage signal level: The level of voltage to the Serial ATA is of differential 500 mV and it's more suitable for PC's technical request than that of 5 Volt Parallel ATA and it can save more power as well
• Pin Pitch Advantage: Serial ATA connector includes a line of 7Pin signal terminal and a line of 15Pin power terminal . These two lines of terminals can be detached to the freestanding tie-in therefore it not only reduces its body size but also enlarge is trans-positional space.
• Transferring Speed Advantage: It almost has no potential to fasten the transferring speed of Parallel ATA. But for the Serial ATA the transferring speed for its incunabular design is 600MB/s