The CPU, the central processing unit, is the heart and brain of every computer. Many of us don’t know the importance of this unit to computer performance. How many of you want to know the basic functions of the CPU? This article will answer that question.By the way, whalekom provides a large number of second-hand CPUs
The four main functions of the CPU
The CPU processes the instructions received in the process of decoding data. When processing this data, the CPU performs four basic steps:
Extraction: Each instruction is stored in memory and has its own address. The processor obtains this address number from the program counter, which is responsible for tracking the instructions that the CPU should execute next.
Decoding: Convert all programs to be executed into assembly instructions. The assembly code must be decoded into binary instructions, which your CPU can understand. This step is called decoding.
Execution: When executing instructions, the CPU can perform one of the following three operations: use its ALU for calculations, move data from one storage location to another storage location or jump to another address.
Storage: After executing an instruction, the CPU must provide feedback and write the output data into the memory.
The number of operations that the CPU can perform depends on its speed (in GHz Hz), and 1 Hz is the speed at which an operation can be performed in one second. Generally, the speed of a computer is measured in gigahertz. 1 GHz is the speed required by the CPU to perform one million simple tasks. “Simple tasks” include the smallest steps that the processor can perform.
Generally, the processor understands and executes assembly instructions that last four cycles. The faster the CPU, the more instructions it can execute in one second, but don’t let this number fool you. CPU speed is not the only indicator that affects computer performance. In order to obtain independent results, many other factors must be evaluated, such as CPU architecture, cache size, and bus speed. When buying a processor, don’t simply pursue the highest speed. Evaluate all factors.
Multi-core processors are actually CPUs with two or more independent cores, which are similar to ordinary processors. They execute program instructions. The main advantage of a multi-core processor is that it can run multiple instructions at the same time. This function greatly improves the performance speed, and all programs with parallel computing functions can run on multi-core processors.
How to test the performance of the CPU?
Various benchmarks and tools can be used to test CPU performance. These tools bring heavy workload to the CPU. However, since the overall performance of the computer involves multiple components (CPU, RAM, video processor, etc.), simultaneous evaluation is used Benchmarks for all these components are important.