The three Most Important Factors that affects the Computer Speed

Overall, the performance of your computer depends on what you are doing and how well the computer component works together as a whole, generally speaking there are some factor that affects more than others 

1) Design and Type of Processor or CPU:  More than anything, the design of the processor determines how it performs. Processors differ not only in the Clock Speed, but also by which components make up the chip, how they're arranged, and how they are connect to each other and to the rest of the computer. The generation is basic model of the processor. Different generations of processor have different levels of performance. For instance a 400 MHz processor of one Brand/Type does not necessarily perform as fast as a 400 MHz of another.

2) Clock Speed : Clock speed represents the number of calculations the processor can do in one second. Current systems are measured in Megahertz (or, millions of cycles per second) - the higher the number, the faster the processor executes instructions. Games, digital imaging, and Internet applications are actually the programs most demanding on a CPU. Productivity software like word processing and home finance don’t require much processor power.

3) Bus Speed: The bus is the electronic pathway your CPU uses to communicate with the rest of the computer. The only way to ever upgrade the bus speed is by replacing the motherboard, or main system board, which is very difficult. Sometimes it is easier to simply buy a new PC than to upgrade one that's very old.

It’s worth to note that there is many other important factors that made a difference, like L2 Cache a very fast memory that is placed directly on the processor and can be accessed by the processor at its full speed measured in MB, RAM the second biggest factor in overall system speed after the CPU and Hard Drive storage for your computer's programs and frequently used data, but as we have mentioned earlier it depends on what you are doing.