Most people would never try to buy a car without first doing their homework, but many do exactly that when it comes to their computer's processor. In the past, selecting a processor was a fairly simple affair, but finding the best model is increasingly difficult these days; understanding the technology requires a lot of reading. Both AMD and Intel offer multiple product lines, each carrying different model names and numbers that are hard to understand intuitively. The following table will give you a rough overview of what is currently available:

1 These are low-cost processors that we do not recommend buying.

Note that all processor families consist of multiple versions that usually run at different clock speeds, but a different model number may also indicate a different feature set. An AMD Turion 64 MT is more efficient than a 64 ML, but technically equivalent and equally fast. However, the Athlon 64 3800+ and Athlon 64 X2 3800+ are different - single versus dual core - and work at different clock speeds. In the Intel world, a Pentium 4 500 with a model ending in a "1" supports 64 bit extensions, while with the Pentium 4 600 line, the last digit being "1" means that it is a 65 nm processors.

The following tables include all AMD and Intel processors that are currently available and will fit in suitable desktop platforms. All you require is a motherboard with Socket 754 (Turion 64) or Socket 479 (first or second generation, depending on whether or not you want to use Core Duo). All these motherboards are bundled with a suitable processor cooler.