Computer processing speed depends on a variety of factors. Three of the most important factors are:

Word length (the number of bits that can be processed at one time by the microprocessor)

Cycle Speed (how fast individual events are processed, measured in Megahertz)

Data Bus Width (determines how much data can be transferred between the CPU and memory)

Other factors Include:

RAM (amount of available random access memory)

Disk Access Speed (speed that data can be read from hard disk)