[Anusha]

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Welcome back to another edition of the AnandTech Buyer's Guides. The one constant in life is change, and what was once an ultrafast component invariably will be surpassed by midrange and eventually budget parts in terms of raw performance. Sometimes this progression will occur quickly, and other times it may take a couple years, but in the world of computers we will all inevitably need to upgrade. For the past several years many people have been quite happy with their computer's performance; for typical applications (not games, video encoding, 3D rendering, or other professional applications) even moderate Pentium 4 or Athlon XP systems continue to run quite well. The pending launch of Windows Vista may finally change all that, with performance requirements that appear to be quite a bit higher than Windows XP - assuming of course that you want to make the switch to the new operating system.