If you're just starting to learn about computers and know about as much as how to turn it on and start up the Internet, a little deeper study into the guts of the PC may be useful to you. Hardwaresecrets.com recently posted a comprehensive and easy to follow guide for PC newbies to get a better understanding of the memory cache. "The memory cache is high-speed memory available inside the CPU in order to speed up access to data and instructions stored in RAM memory." Get started on the tutorial here.