"A hands-on preview of the latest operating system coming to Macs: OS X Mavericks. The next version of OS X adds power, flexibility, and features to the existing version, OS X Mountain Lion, but if you upgrade from the most current version, you won't notice much of a difference at first glance."
Slow computer got you down? Maybe a hardware upgrade should be in your cards, if so this guide to the Fundamentals of Upgrading a PC is an invaluable read. PCSTATS Tips