Intel Core i3 VS Core i5 VS Core i7

-- Core i3 -- * Entry-level * Cheaper * 2 cores and hyperthreading -- Core i5 -- * Mainstream-level * 2 cores and hyperthreading or 4 cores and no hyperthreading * Improved onboard graphics * Turbo boost -- Core i7 -- * High-End level * 2-8 cores * Can support 2-8 memory sticks * Hyperthreading * More cache * Faster turbo boost * Even better onboard graphics Conclusion: i7 is considered high-end, i5 mid-level, and i3 entry level. Even though the numbers do matter, there are other factors that affect the performance of your CPU Check out this article for a more detailed explanation:

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