Is a quad-core processor twice as quick as a dual-core processor?
Question by DrSunil Vaswani /

Is quad-core processor double strength of a dual-core processor? As name implies – quad ~ four and dual ~ two

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Answers (36)
  • Anay Chaubal

    There are more issues that affect a processor’s speed than the number of cores. For example, Intel has 3 dual core processors for PCs, the intel pentium dual core, the intel core2duo, and the core i3.
    the deal is that, core i3 is fastest, Core2Duo is next, and pentium dual core is the slowest at any given fixed clock speed.

    This is because of the architecture of the processors. In pentium dual core, there are just 2 cores placed on a single die, and there are connections running between them for data transfer. In core2Duo, there are 2 cores on a die, and they are interconnected at the basic architecture itself. Core i3 is a more modern processor with a larger number of transistors, and thus better processing power than the core2duo.

    also, the ram used in the whole computer / mobile device runs on a certain clock speed / frequency. the higher the frequency, the higher the rate of data transfer between the cpu and the storage, then there is the whole cache memory deal.

    thus while it seems that a quad core cpu would be twice as fast as a dual core one, its really the whole computer / mobile device architecture which affects how much fast the device is as a whole.

  • Usman Mubashir

    Quad core is not faster, but can handle more data at a single time. I’m trying to say what a dual core can do with full power, a quad core will do with half power. so with dual core you will not be able to calculate more, but a quad core will be able to provide 100% more capacity to process.

  • Chris Marcoe

    Tom’s Hardware has a great thread about it. Bottom line is: It depends on what you are using it for.

    http://www.tomshardware.com/forum/343682-28-dual-core-quad-core

    Also, this will show you several threads that ask the same thing.

    • DrSunil Vaswani

      Thanks

      How does the different manufacturer affect performance of processors having identical specifications ( clock speed , cores ) Please elaborate with examples

  • Nicut Alexandru

    Hi! Answering your question could be tricky.
    The idea pointed in mostly of the answers is correct: if the software (including the OS) is not written to take advantage of the “extra” cores, they will just be sitting idle instead of doing real work and even if the software is written in a manner that it will use all available cores, you will lose some processing time due to thread scheduling
    Basically, it’s all in the way the 4 core CPU and the 2 core CPU are designed.
    The clocks aren’t important. Important it’s the way they are used: hyper-treading, fsb, caches, 64 bits support, etc

    • DrSunil Vaswani

      How does number or cores and clock speed affect battery conservation? and is there lesser burden on battery in a device with dual core than in single core? and so there is lesser heating of battery in dual core than in a single core?

    • Nicut Alexandru

      The impact is very little. In basic, newer CPU’s with more than one core are released by the manufacturer with lower power consumption and newer technologies that allow better use of the clock cycles, if possible.
      Ex: an i5 intel on an laptop has hyper-treading. The desktop version hasn’t.
      The big situation is created by the running processes, services and the usage of the CPU. Smartphones, netbooks, laptops, etc : the heavier is the usage of the CPU, the faster the energy drain from the battery, because it’s needed to power up the clock cycles.

      Ex: Nokia Asha 302 > Stand-by Up to 707 h (2G) / Up to 830 h (3G)
      Talk time Up to 9 h (2G) / Up to 5 h 50 min (3G)
      Music play Up to 50 h

    • DrSunil Vaswani

      Thanks

      How does the different manufacturer affect performance of processors having identical specifications ( clock speed , cores ). Please elaborate with examples

  • Rakesh Pal

    absoloutly not it means you can run double number of process but not double the speed unless the clock speed in double

    • DrSunil Vaswani

      How does number or cores and clock speed affect battery conservation? and is there lesser burden on battery in a device with dual core than in single core? and so lesser heating of battery in dual core than in a single core?

  • Indronil Mondal

    absoloutly not it means you can run double number of process but not double the speed unless the clock speed in double

  • Junil Maharjan

    since it is quad core which has 4 core processors it would be faster than the dual core which has two core processors but it also depends upon the clock speed of the processors.

    • DrSunil Vaswani

      Thanks

      pending a sub-question to same topic : Please give examples of clock-speeds and how to rate them based on their units and even makes/brands? For egl., how would you generally rate and compare Dual-core 1 GHz Cortex-A9?

  • Noman Fayez

    isn’t a 1.7GHz core i7 better than a 2.4Ghz core i5?

    • DrSunil Vaswani

      Thanks for replying

      pl note : As per protocols of portal , questions may be asked in questions section

  • Carlos Remonza

    If you are asking about speed then get a faster processor or clock speed. If you are asking to do many things at once or multitask then get more cores.

    I give u some real world example:

    2 athlete from country A and 4 athlete from country B participate in a lets just say 100m sprint. The two athlete from country A has a top speed of 10miles/hr thus runs faster than all of the 4 runners which has a top speed of 7miles/hr from the country B. Therefore those from country A wins the race.

    But,

    If they participate in a house building tournament which involve teamwork (i made that up but u get the meaning) therefore those 4 people could easily win (unless 2 out of 4 person is sleeping).

    • Sharjeel Larik

      I really appreciate the example given by Carlos Remonza. To any person, quad Core would definitely seem attractive when comparing processors; however, if everything else remains constant and money remains unlimited, you should go for a quad-core processor with more clock speed.

    • DrSunil Vaswani

      Dear Carlos

      I read your answer carefully

      Thanks for taking interest in this topic

    • Susan Sanders

      Excellent analogy, thank you for giving an understandable example.

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