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    920XM vs 620M (turbo question)

    Discussion in 'Hardware Components and Aftermarket Upgrades' started by dropro, Feb 6, 2010.

  1. dropro

    dropro Notebook Geek

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    According to this info ( http://www.legitreviews.com/article/1084/1/), when the 920XM is running only 2 cores, it is at 3.06 Ghz, and 3.20 Ghz with only one core. The 620M, meanwhile, is 2.66 Ghz with 2 cores and 3.33 Ghz with one core. So it's nominally slower with one core, faster with two cores, and of course it can do 3 and 4 cores and the 620M can't.

    I've often read that if you have single threaded apps, the 620M will be considerably faster. Now I'm wondering if I've misunderstood. Based on above, looks like in true single threaded they may be essentially neck and neck (3.2 vs. 3.33), and in 2 cores, the 920XM is faster, and of course with many threaded apps the 920XM is much faster.

    Thoughts?
     
    dropro, Feb 6, 2010
    #1
  2. Signus

    Signus Notebook Enthusiast

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    Well with the 920xm you can overclock it to a higher speed which makes it faster both 2 and 1 cores
     
    Signus, Feb 7, 2010
    #2
  3. Amnesiac

    Amnesiac 404

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    I think the 920XM is going to faster in just about every application, if not every single one. It has an insane amount of cache compared to the 620M, and the extra cores, both logical and real, make it much faster for heavy multitasking and core heavy applications. I think the 620M is going to be a little faster than the 720QM in threads that use only 4 threads or less, but the 920XM is going to be faster I think.

    That said, the 920XM is extremely expensive, and unless I REALLY needed it, I would not buy it, as I don't think the extra performance is worth the massive price premium you have to pay for it.
     
    Amnesiac, Feb 7, 2010
    #3
  4. sgogeta4

    sgogeta4 Notebook Nobel Laureate

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    Looking at the price, it better spank the crap out of the 620M :p
     
    sgogeta4, Feb 7, 2010
    #4
  5. sean473

    sean473 Notebook Prophet

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    Agreed... IMO 620M is way cheaper and good enough.... if u need a quad , get a i7-820qm at most... 920qm is overpriced...
     
    sean473, Feb 7, 2010
    #5
  6. naton

    naton Notebook Virtuoso

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    What can be used to overclock on i3, i5, or i7 on a laptop?
     
    naton, Feb 7, 2010
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  7. Signus

    Signus Notebook Enthusiast

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    Only the extreme edition's can be overclocked using the unlocked v core or something like that. but to my knowledge only the 920XM can be over clocked higher
     
    Signus, Feb 7, 2010
    #7
  8. IntelUser

    IntelUser Notebook Deity

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    The 620M can clock at 3.06GHz with 2 cores, so it'll be fairly close. The higher bandwidth and the larger shared L3 cache of the 920XM would probably only make it 5% faster.
     
    IntelUser, Feb 7, 2010
    #8