Purchase of a new laptop means assessing capacity performance. My memory space on my new laptop has some room and so I was looking for faster streaming and video as well as application speed. The DDR2 is the new laptop designation for upper memory processing. I expected DDR memory technology would be more costly but I got a great deal, this was usually $79.99. The apps loaded at noticeably faster speeds. I do get a few more minutes of power when working from battery power. I also notice some cooler performance when working in an enclosed space. Vista means 1 gig is a small slice but without the bloatware off the laptop, the machine desktop it works just great. Nice to work loading video and multiple applications at the same time. At this price I would advise buying up to slot capacity.