what is CPU ?
Describe
the
various
parts
of
CPU.
Answers
❤️A central processing unit, also called a central processor or main processor, is the electronic circuitry within a computer that executes instructions that make up a computer program. The CPU performs basic arithmetic, logic, controlling, and input/output operations specified by the instructions in the program.❤️
1. Motherboard: This is the part where all the other part such as RAM, Disk Drive, Graphics Processing Unit (GPU), the Processor and other things are attached. It is the part that supplies power to all other parts from.
2. Disk Drive: Hard disks are of two types: 1. Hard Disk Drives (HDD) and 2. Solid State Drives (SSD). The Solid state drives are newer as compared to hard disk drives. SSDs are 6 times faster than HDD. Disk Drives stores the data, such as the Operating System you are running, the files and programs, etc on your computer.
3. RAM: Random Access Memory is used to store temporary data which means that when you use your computer the work of RAM starts, unlike Disk drives which stores data permanently.
4. CMOS Battery: This battery is usually a flat-shaped battery. They reserve the date and time and other settings of your computer. If the charge of the battery gets down, you get a motherboard error when you will start a computer.
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Answer:
The central processing unit (CPU) is the brain of your computer. It handles all the instructions you give your computer, and the faster it does this, the better. Learn about how a CPU processes instructions and how computer engineers are continuously coming up with ways to make it go faster.
Introduction
So you're shopping for a new computer in an electronics store and you're trying to make sense of the technical specifications. One computer that looks pretty cool has a 64-bit quad-core Intel i7 3.5 GHz processor. Sounds impressive, but what does it really mean?
The last computer you bought a few years ago had a sticker on it that said Pentium 4, but you don't remember the details. The computer was getting sort of slow, but why would you need a 64-bit quad-core? Why exactly is this better than the processor in your old computer? To understand what the specifications mean, we first have to look at how the processor is designed and how it functions.
Definitions
The central processing unit (CPU) of a computer is a piece of hardware that carries out the instructions of a computer program. It performs the basic arithmetical, logical, and input/output operations of a computer system. The CPU is like the brains of the computer - every instruction, no matter how simple, has to go through the CPU. So let's say you press the letter 'k' on your keyboard and it appears on the screen - the CPU of your computer is what makes this possible. The CPU is sometimes also referred to as the central processor unit, or processor for short. So when you are looking at the specifications of a computer at your local electronics store, it typically refers to the CPU as the processor.
When we start to look at the various components of a CPU and how they function, remember that this is all about speed. When we use a computer, we want the instructions to be carried out very fast. As the instructions become more complicated (for example, creating a 3D animation or editing a video file), we demand more from the CPU. Thus, the technological advances we have seen in processor technology have largely been driven by the need for speed.
Components
A typical CPU has a number of components. The first is the arithmetic logic unit (ALU), which performs simple arithmetic and logical operations. Second is the control unit (CU), which manages the various components of the computer. It reads and interprets instructions from memory and transforms them into a series of signals to activate other parts of the computer. The control unit calls upon the arithmetic logic unit to perform the necessary calculations.
Third is the cache, which serves as high-speed memory where instructions can be copied to and retrieved. Early CPUs consisted of many separate components, but since the 1970s, they have been constructed as a single integrated unit called a microprocessor. As such, a CPU is a specific type of microprocessor. The individual components of a CPU have become so integrated that you can't even recognize them from the outside. This CPU is about two inches by two inches in size.
CPUs are located on the motherboard. Motherboards have a socket for this, which is specific for a certain type of processor. A CPU gets very hot and therefore needs its own cooling system in the form of a heat sink and/or fan.
CPU located on a motherboard with a heat sink and fan directly on top
CPU with heatsink and fan
The ALU is where the calculations occur, but how do these calculations actually get carried out? To a computer, the world consists of zeros and ones. Inside a processor, we can store zeros and ones using transistors. These are microscopic switches that control the flow of electricity depending on whether the switch is on or off. So the transistor contains binary information: a one if a current passes through and a zero if a current does not pass through.
Transistors are located on a very thin slice of silicon. A single silicon chip can contain thousands of transistors. A single CPU contains a large number of chips. Combined, these only cover about a square inch or so. In a modern CPU, however, that square inch can hold several hundred million transistors - the very latest high-end CPUs have over one billion! Calculations are performed by signals turning on or off different combinations of transistors. And more transistors means more calculations. You may be interested to know that the material, silicon, used in chips is what gave the Silicon Valley region of California its name.
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