Understanding some of these factors will help you make the proper choices when designing your homebuilt computer. What factors determine a CPUs processing power? Finding two prime factors of a very large number is a difficult task for most computers. For example, the first computer processor was the Intel 4004, which was only a 740 kHz processor capable of processing … It takes a number of pieces of hardware working together to determine your computer's overall performance. The speed of your CPU or processor determines how fast computers process instructions. There are many factors that affect processor performance. The central processing unit (CPU) is the brain of your computer and of course, the processor speed definitely matters. These Factors Affect Computer Speed: #1 Processor Speed and Instruction Set. The answer is, no. Number of cores, how quickly the processor can work (clock speed), and the amount of immediate access memory (cache memory). First, the computer must determine the factors of the large number. A computer's speed and processing power aren't attributable to a single component. Computer form factors are important for any potential PC builder or upgrader, because they’re a fixed set of dimensions that assure components fit together, and dictate the … Other factors affecting performance include RAM size and disk speed. It is generally measured in MHz or GHz (megahertz or gigahertz). Suppose, you have only doubled the clock speed, will your CPU work two times faster than before? The most important factors affecting processor performance are: Instruction Set The Clock speed cannot determine the processing speed of a computer. When you say “speed” do you mean Clock speed, throughput (IPC), latency, or what? All of these take away from the computer’s resources and power as they are running, using the processors power that has to be shared with other things you want to run. when a computer is turned on: Most computers have programs or parts of them as well as utilities starting when the computers starts up. It is one measure of computer power. Computer performance depends on the processing speed of a computer. Processing power. If you mean clock speed then that has to do with power consumption and lithography. A computer will normally have a maximum clock speed set by default, but it is possible to change this speed in the computer BIOS. Factors that affect computer performance include the speed of the central processing unit (CPU), memory capacity and input/output devices. Factors Affecting CPU Performance . Other Factors That Determine the Performance of a Computer. Multiple-core processors increase computing power while using less electricity [source: Intel] Even fast computers can take years to complete certain tasks. Processor (CPU) The overall speed or clock speed of the computer and how fast it is capable of processing data is managed by the computer processor ().A good processor is capable of executing more instructions every second, hence, increased speed. In general, laptops tend to have less power and flexibility when it comes to processors. They’re obviously super-convenient for users who like the mobility of a laptop, but if you need a super-high-speed processor or high clock speed, you may want to look at a desktop computer to meet your processing needs. 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