Serial ATA Cable Compared with the Parallel ATA , Serial ATA has more advantages as per below listed: 1. Lower voltage signal level: The level of voltage to the Serial ATA is of differential 500 mV , and its more suitable for PCs technical request than that of 5 Volt Parallel ATA, and it can save more power as well. 2. 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. 3. 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 150MB/s , and now it is striding forward to the speed of 300MB/s and even up to 600MB/s . 4.Cable: AWM 21149 UL 16070. Cable 20 Inches Available, with Bracket with 6.5 Inches 4 Pin Big Power Cable.