for interactive tasks a few cores is all that's needed in my experience. nothing seems to thread all that well beyond 2-3 in modelling, etc. if at all. i'd aim for highest clock speed that fits the budget. these 6(12)-core i7 machines appear to be a sweet spot for performance all around but the somewhat higher clocked 4(8) core i7's are fine, too.
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i'd aim for highest clock speed that fits the budget. these 6(12)-core i7 machines appear to be a sweet spot for performance all around but the somewhat higher clocked 4(8) core i7's are fine, too.