We recently looked at the impact of a hard drive upgrade on a desktop PC to find out whether or not it’s worth replacing a three-year-old disk with a brand new one. Our scenario involved the now-common choice of upgrading from Windows XP or Vista to Windows 7, and starting over with new storage at the same time. We found small benefits on the power consumption side and more noticeable increases on the performance side.

In short, if you intend to make major modifications to your system, then it makes a lot of sense to question your hard drive. Capacity, performance, and power consumption have reached new levels. But what are the results on a mobile machine, where many of those factors end up being multiplied? Can you get noticeably more performance or increase the battery life if you exchange the hard drive?

Desktop drives have marched straight up to 2TB capacities, but progress has been even more extensive on the mobile side. While 2.5” hard drives remain much slower than desktop hard drives, capacities have reached 640GB, and the drives have been more finely tuned for power consumption and efficiency. Additionally, growth in the mobile space has been more substantial than…