which is the best intel i5 processor

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I'll toss in my recommendation for the Haswell i5-4670k.

However, if you can find a good deal for the Ivy Bridge i5-3570k, then that will work too. The average performance increase to Haswell is about 6%. It can also reach higher overclock speed. It appears the percentage of i5-3570k that can be overclocked to 4.5GHz is higher than for the i5-4670k based on user feedback.

Going with Ivy Bridge (socket 1155) will mean you cannot upgrade to Broadwell in late 2014 (socket 1150). However, the improvement in CPU performance vs Haswell will likely be fairly small again (~6%) since the goal is to reduce power consumption. The integrated graphics core will probably increase in performance by about 30% - 40%, but it can't compete against a...

PyjamasCat

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Mar 20, 2013
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Almost. 4670K stock yes (due to being around 10% faster), but OCing depends on each individual chip, cooling system and climate entirely. I have seen 4670K's reach 4.4 - 4.8GHz and 3570K's reach 4.5 - 4.9GHz as top values before being unstable or too hot. There is just too much variation to determine whether an OC'ed 4670K is slower than an OC'ed 3570K, so I'd leave that part to chance.
 
I'll toss in my recommendation for the Haswell i5-4670k.

However, if you can find a good deal for the Ivy Bridge i5-3570k, then that will work too. The average performance increase to Haswell is about 6%. It can also reach higher overclock speed. It appears the percentage of i5-3570k that can be overclocked to 4.5GHz is higher than for the i5-4670k based on user feedback.

Going with Ivy Bridge (socket 1155) will mean you cannot upgrade to Broadwell in late 2014 (socket 1150). However, the improvement in CPU performance vs Haswell will likely be fairly small again (~6%) since the goal is to reduce power consumption. The integrated graphics core will probably increase in performance by about 30% - 40%, but it can't compete against a moderately priced graphics card. Therefore, even if you buy the i5-4670k, you are not likely to upgrade to Broadwell anyway unless the i5-4670k somehow dies.
 
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