The non-K Haswell's are actually a step backwards as they run roughly 400MHz slower than their non-K Ivy Bridge predecessors on a good motherboard. My advice is to either get a 4670K (performance) or a 3470/3570 (budget). We compare the specs of the Intel 750 to see how it stacks up against its competitors including the Intel Core i5 650, Intel Core i5 2400 and Intel Core i3. Eg:-3470 = 3.2GHz Base but can be OC'd to 3.8-4.0GHz (3.4-3.6GHz Turbo + 400MHz)4570 = 3.2GHz Base but can be OC'd to 3.4-3.6GHz (3.4-3.6GHz Turbo - NO extra +400Mhz 'limited OC')3570 = 3.4GHz Base but can be OC'd to 4.0-4.2GHz (3.6-3.8GHz Turbo + 400MHz)4670 = 3.4GHz Base but can be OC'd to 3.6-3.8GHz (3.6-3.8GHz Turbo - NO extra +400Mhz 'limited OC')Overall, Haswell's are 1-10% faster (more efficient) than Ivy's (depending on game), but Ivy non-K's are a constant 10% faster vs Haswell non-K's (due to +4 extra multipliers) under all games.So believe it or not, an i5-3570 (non-K) is faster at max Turbo than an i5-4670 (non-K). Why? Because Intel removed the +4-bins OC feature from non K chips on Haswells vs Ivy's so all the non-K Haswells are actually slower than the Ivy chips they're supposed to replace (with a Z77 motherboard). If you're getting a Haswell you might as well get the 4670k.
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