Why Dual Core, Quad Core And Octa Core....????

Post related to Microprocessor, Microcontroller & real time system.
Post Reply
User avatar
deepak.dhiman55
Posts: 13
Joined: Wed Apr 09, 2014 8:52 pm
Location: Ambala City

Why Dual Core, Quad Core And Octa Core....????

Post by deepak.dhiman55 » Sat Aug 16, 2014 10:25 pm

Can`t Understand, Why We are not able to cross 3.0 Ghz Clock speed Of Micro Processor Since 2005...Yaaa They had Doubled The chip Density NO Doubt About That,,, Like Today WE have "Dual Core , Quad Core And Octa Core" Processor...But Still their Frequency Is LIke "2.4 GHz , 2.6GHz And 2.8 GHz"...Why they are Not Making "5.0 GHz Dual Core Processor" instead Of "2.4 Ghz Quad Core Processor" ????

User avatar
Narveer
Posts: 59
Joined: Tue Apr 08, 2014 11:29 am
Location: Bangalore, INDIA

Re: Why Dual Core, Quad Core And Octa Core....????

Post by Narveer » Sun Aug 17, 2014 7:18 pm

You can even make a processor of 10 GHZ or more with today available. Si technology at 45 nm node but why to do so .......???? when it is of no use...... we are shrinking the size not to increase the speed of processor now a days .... it is only for increasing the storage capacity (i.e Memories) for their storage capabilities and operation frequency......

Tell me what is the need of increasing the speed beyond 4 GHZ as you are not even able to utilize half of it? the limiting factor is the outer peripherals and interconnects which fetch and receive the data to Processor I.e Cash and RAM memories, and HDD. see at what clock frequencies they works on...... and you found that..... their is a drastic change in speed of these devices and Processor that you are using today. therefore these are not even competent enough to tackle the data at this speed.....

To understand it more clearly you may take an analogy to real world,
Imagine that you are going to drive a car from Delhi to Kurukshetra on national highway 1. You speed up every time you are out of city road and slow down while a city came in between on the road. This is because of the conjution in the town the traffic moves slowly but out of the town the traffic is less and you can move faster. But in case of processor it is other way round. Now consider the Processor as the cities on the road and interconnecting peripheral track on PCB and RAM memory and HDD etc. as roads outside the cities. Here the data travels fast in packed processor and move slows in the roads of interconnecting peripherals.
Thus the limitation is the operating frequencies of the interconnecting peripherals to the processor not the processor. It is true as if for today and for at least in future 20 years or so. This limits the useable frequency of the processor although somehow, this has been tackled with the piplining architecture approach while designing the processor but still not enough to completely utilize its capabilities of processor. You can achieve it by reducing the interconnect delays by changing them from electrical to optical fibers. This is true for interconnects at PCB as well as in ICs and Processor interconnects.

User avatar
deepak.dhiman55
Posts: 13
Joined: Wed Apr 09, 2014 8:52 pm
Location: Ambala City

Re: Why Dual Core, Quad Core And Octa Core....????

Post by deepak.dhiman55 » Thu Aug 21, 2014 8:56 pm

Thanks A Lot Narveer Sir, For sharing valuable Knowledge In A Simple way...Now i got the funda...

Post Reply