what are the intel i3,i5,i7 ?what are the differences between them?

What are the Intel core i3, i5, i7 ?

                        Intel is a company which designed and developed the Intel core i3 and i5 and i7 processors for computers. In these three processors. there are different types of generations like i3 5th generation processors or i7 6^th generation processors, etc. However in general i7 processors are better than i5 processors which are better than i3 processors.

NOTE: Intel® Core™ processors use an alphanumeric scheme based on generation and product line following the brand and its modifier. 

               

        From the above figure                  

Brand modifier:- it says model of the processors for example if it is i3 then we say core i3 processor.

Gen indicator:- The first digit in the four number series  shows generation of the processor for example if it is 5 then it will be 5^th generation core i7 processor .

SKU DIGITS:- They tell you how powerful a particular CPU is relative to other CPUs in the same CPU family.  It doesn’t tell you any specific data about the CPU only that, for example, an Intel Core i7 6820K is faster than an Intel Core i7-6700K.

               This one or two letter code gives further information about the processor such as whether it’s unlocked or optimized in various ways.  An unlocked processor is one that the user can make run faster than given specifications. But this code varies between generations:

1. H: High performance graphics (Generation 5, 6)
2. HK: High performance graphics, unlocked (Generation 6)
3. HQ: High performance graphics, quad core (Generation 4, 5, 6)
4. M: Mobile (Generation 2, 3, 4)
5. MQ: Quad core mobile (Generation 4)
6. MX: Mobile extreme edition (Generation 4)
7. QM: Quad core mobile (Generation 2, 3)
8. U: Ultra low power (Generation 3, 4, 5, 6)
9. Y: Extremely low power (Generation 3, 4)

 Difference between core i3, i5 ,i7:

MODEL	Core i3	Core i5	Core i7
Number of cores	2	4	4
Hyper-threading	Yes	No	Yes
Turbo boost	No	Yes	Yes
K model	No	Yes	Yes
Power consumption	35 w - 73 w	17 w- 95 w	45 w- 130 w
Clock rate	1.2 GHz - 3.7 GHz	1.06 GHZ – 3.6 GHZ	1.6 GHZ to 4.4 GHZ
Cache size	3 MB – 4 MB	4 MB – 8 MB	6 MB – 10 MB
Price	Low	Mid-range	Expensive

What is core:-

           a core is the processing unit which receives instructions and performs calculations, or actions, based on those instructions. A set of instructions can allow a software program perform a specific function. 

              Processors can have a single core or multiple cores. A processor with two cores is called a dual-core processor and four cores are called a quad-core processor. Processors for home computers can even have six or eight cores. The more cores a processor has, the more sets of instructions the processor can receive and process at the same time, which makes the computer faster.

Hyper-threading:-

            Hyper-threading is a technology Which is Intel’s processor architecture that allows single processor to act like two separate processors to the operating system. With the help of hyper-threading microprocessor’s core can execute two instructions simultaneously which are sent by operating system.

                 It allows the processor that it can do more work during each clock cycle. The hyper-threading microprocessor pretends that microprocessor has two separate processors to the operating system.

Turbo boost:-

               turbo boost is a technology which enables the processor to run above its base clock speed. That is, A 3.0 GHz CPU can automatically boost itself up to 3.5 GHz if the optimal conditions are available.

K Model:-

              The K on the Intel core processors is used to show that the processor has an unlocked multiplier. With the help of unlocked multiplier processor can be easily overclocked than base clock frequency.

Clock rate:-

                Clock rate refers to number of clock pulses generated by oscillator within the given unit of time. Clock rate is controlled by quartz crystal circuit.

          For example 3.0 GHZ processor can execute 3 billion clock pulses per second.

          Some microprocessor can execute only one instruction per each clock pulse. But fortunately some advance processor can execute more than one instruction per each clock pulse.

Cache:-

             

        Whenever the CPU finds that it keeps on using the same data over and over, it stores that data in its cache. Cache is just like RAM, only faster — because it’s built into the CPU itself. Both RAM and cache serve as holding areas for frequently used data. Without them, the CPU would have to keep on reading from the hard disk drive, which would take a lot more time.

Basically, RAM minimizes interaction with the hard disk, where as cache minimizes interaction with the RAM. Obviously, with a larger cache, more data can be accessed quickly.     

Which processor should you buy?

As far as I know

Core i3:-                     

              it is economical . it is for basic users who browses internet and makes video calls and uses Microsoft office.it is not enough for users who are professionals and gamers.

Core i5:-

                It is for intermediate users. if you buy an HQ or a Q processor with  a dedicated graphics processor then it will be good for gaming.

Core i5:-

                    It is good for those who are professionals.