The decoder translates this code into signals, which it then passes to other parts of the CPU in order to execute the instruction. The instruction is in the form of binary code a string of ones and zeros. Once the CPU fetches an instruction, it needs to decode it. The program counter then updates-the CPU now has the address of the next instruction it will need to fetch. The CPU reads an address of where the instruction to be fetched is stored. The first step is retrieving, or fetching, an instruction from program memory. CPUs can perform millions of these instructions per second. These three steps are commonly known as Fetch, Decode, and Execute. It decodes those instructions and then executes them-this is the basic method that any modern computing device works in practice. In simple terms, a CPU takes instructions from the software in your computer. It’s one of the most important parts of your computer, and the type of CPU installed in your device can make a big difference to its performance. You can find CPUs in desktop and laptop computers, but also in many other electronic devices, such as smartphones, tablets, smartwatches, media players, televisions, and even washing machines. Put simply, without the CPU, your computer isn’t able to be a computer. It performs the necessary calculations used to run your operating system, load your favorite apps, play games, create files, and more. Even this isn’t totally accurate-the Graphics Processing Unit (GPU) often handles a lot of the math related to graphics.įor most of the tasks performed on your PC, however, your CPU is what makes the magic happen. It is a chip inside your electronic device that acts as the brain of your computer.Ī better analogy would be that the CPU is the part of the brain that does all the math. What Is a CPU?ĬPU stands for Central Processing Unit. What is a CPU, exactly? What does a CPU do, and what do the different CPU specifications mean? Let’s explore this topic below. There are actually CPUs in many of the electronic devices that you’ll use, including mobile phones and other smart devices. Your CPU is actually one of the most important parts of your PC or Mac and it’s a term that’s been in use since the 1950s.
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