PC Guide: Central processing unit(CPU)

Welcome to PC Guide, today will be going to Central processing unit(CPU) also know as the Processor. The CPU is the most important component of the Computer System. It responsible for interpreting and executing most of the commands from the computer’s other hardware and software. All sorts of devices use a CPU, including desktop, laptop, and tablet computers, smartphones, even your flat screen television set. Intel and AMD are the  two main manufactures of CPU.


What Is Central processing unit

A Central processing unit is the electronic circuitry within a computer that carries out the instructions of a computer program by performing the basic arithmetic, logical, control and input/output (I/O) operations specified by the instructions.(Wikipedia).

The central processing unit may also be called : processor, computer processor, microprocessor, CPU, systems on a chip (SoC) , and “the brains of the computer”.

 CPU Performance

CPU performance is the amount of work accomplished by a processor, since it brains of the computer it important for you to know the work rate of a CPU. The performance of a CPU can be determine form it:

Clock Rate or Clock Speed 

The clock speed of a processor is the frequency at which it can process a number or number of instructions it can process in any given second, measured in Gigahertz (GHz).

Turbo Boost

Turbo Boost is a technology made by Intel which enables the processor some of it processor e.g core i5 & i7 to run above its base operating clock speed.

Example a Intel Core i5-6600K @ 3.50GHz CPU which has a clock speed of 3.50GHz can  process 3.50 billion instructions each and every second. And a Turbo Boost of 3.90 GHz.

Related: PC Guide: Intel CPU

Numbers Of processing Cores

cores is the number of processor working side by side. Some devices have a single-core processor while others may have a dual-core or quad-core or many more  processor. As it might already known, having two processor units or more working side-by-side means that the CPU can manage twice the instructions every second, simultaneously, drastically improving performance.

Most Intel CPU has a technology called Hyper-Threading, which virtualize two cores for every one physical core that’s available. This means a CPU with only  4 cores can function as if it has 8, with the additional virtual CPU cores, referred to as  threads. Note, however, that physical cores do perform better than virtual ones.

Example a Intel Core i5-6600K @ 3.50GHz CPU which has 4 cores. with additional 4 cores threads.

CPU cache

A CPU cache is a smaller, faster memory, closer to a processor core, which stores copies of the data from frequently used main memory(RAM) which is used by the central processing unit.CPU Cache is faster than using RAM because it’s a physical part of the processor; more cache means more space for holding such information.

Example a Intel Core i5-6600K @ 3.50GHz CPU with 6 MB SmartCache.

Related: PC Guide: AMD CPU

Thermal design power(TDP)

Thermal design power (TDP), sometimes called thermal design point, is the  amount of heat generated by a computer chip or component (often the CPU or GPU) on a normal work load. TDP is technically the max amount of power the cooling system needs to dissipate in order to keep the chip at or below its maximum temperature and measured in WATT(W).

Example a Intel Core i5-6600K @ 3.50GHz CPU with TDP 91 W.


Bus Speed

Bus speed usually refers to the speed of the front side bus (FSB), which typically carry data between the CPU to the northbridge.  Since the CPU reaches the memory controller though the northbridge, FSB speed can dramatically affect a computer’s performance.

Example a Intel Core i5-6600K @ 3.50GHz CPU 8 GT/s DMI3.


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