How much of an upgrade to haswell

I have a q8300 and might consider getting a upgrade. How much of a performance upgrade would i get if i got a i5 4430 as i am not looking to overclock?
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More about upgrade haswell
  1. http://www.tomshardware.com/reviews/gaming-cpu-review-overclock,3106-5.html

    Four tiers according to that chart, since you are not an OCer, it will be a HUGE CPU improvement.
  2. big upgrade, but why not get the 4670?
  3. Generally speaking, going from an Intel C2D / C2Q to Haswell and assuming the same clockspeed, the performance increase would be over 33%. Average performance increase is as follows:

    C2D / C2Q ---> 1st Gen Core i3/i5/i7 = 10%
    1st Gen Core i3/i5/i7 ---> 2nd Gen Core i3/i5/i7 = 12%
    2nd Gen Core i3/i5/i7 ---> 3rd Gen Core i3/i5/i7 = 6%
    3rd Gen Core i3/i5/i7 ---> 4th Gen Core i3/i5/i7 = 4%

    Overall average performance increase = (1.1 * 1.12 * 1.06 * 1.04) -1 = 1.358 -1 = .358 = 35.8%
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