Have you heard of an SSD?  This is a replacement for your mechanical hard drive, and if you have one in place of that normal SATA drive, you will see enormous increases in speed.  I have an SSD installed in my laptop and my desktop computers as the primary OS drive and the difference in speed is nothing short of phenominal!  This works primarily because the SSD has no moving parts.  It works kind of like a memory stick, thumb drive, USB memory, or whatever you might call it.  There is no defrag to concern yourself with and there is no noise from the hard drive churning.