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    i5 vs i7 power consumption

    Discussion in 'Hardware Components and Aftermarket Upgrades' started by strahc, Mar 19, 2012.

  1. strahc

    strahc Notebook Enthusiast

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    Hi,

    I've got another power-consumption question:

    What would be the difference in power consumption between these two models:
    - i5 2435M
    - i7 2640M

    Both have TDP 35W. What would be the difference in the consumption e.g. internet browsing, watching movies, writing texts?
    5% or >20%? :)

    How faster is the i7 compared to i5 in intensive cpu benchmarks (if both are clocked at the same speed)?

    Thanks!
     
    strahc, Mar 19, 2012
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  2. sgogeta4

    sgogeta4 Notebook Nobel Laureate

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    Power consumption scales fairly linearly with clock speed but not at a 1:1 rate (ie. a 2GHz CPU will not consume 100% more power than a 1GHz one). At idle, it would be negligible since they both downclock. i5 and i7 are marketing terms for CPUs that have been binned from similar dies and hence if the two have the same clock speed, they will perform the same. The extra cache has some benefit in certain situations but I doubt it would be more than 10%, if that at all.
     
    sgogeta4, Mar 19, 2012
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