CPUs

In terms of your desktop components, CPUs are the "brains" of computers. This is where the system gets the go-ahead for all of the processes in which you are engaging. Although other parts of the system can dictate your system's speed, it's the computer processor that is the ultimate arbiter of what you can do with your system.

The CPU is also called the "processor" or "microprocessor." Almost all processors are microprocessors these days, so the names are virtually interchangeable. The reason they are called "micro"processors is because all of the data is contained in a tiny chip. Despite the small size of these chips, every 18 months or so, the amount of information they can hold and transfer increases dramatically.

Processors offer speeds of multiple GHz now, more than many computer users need. If you do a lot of video editing or play some of the more advanced games, you may benefit from these extreme speeds. Otherwise, you will just end up paying for more speed than you really need. However, always be sure to check your favorite software for system requirements; you don't want to invest in software that your system can't handle.

The microprocessor superstars, Intel and AMD, make microprocessors in a number of speeds and prices. For instance, Intel makes the Pentium 4 and the Celeron (as well as an Extreme Pentium 4, their fastest). For price-conscious consumers, the family of Intel processors includes the Celeron, which offers enough speed for average computer use at a lower cost than the super-speedy Pentium 4. Those shopping for price may also want to consider an AMD processor. Look at the programs you want to use, then choose your CPU (and RAM!) accordingly.