"A standard notebook hard drive operates at 4200 RPM (rotations per
minute) while modern desktop drives spin at 7200 RPM. This lower speed
means slower access to information, which means more time drumming your
fingers. Furthermore, notebooks are often sold with only 256MB to 512MB
of memory, which is also often shared with the video card. This can cut
usable memory by as much as 25% in some cases!"