Which Intel Core CPU is the best? How do I decide between a Core i3, i5, i7 or i9?

From the moment you decide that your current Intel processor just isn’t up to par and start investigating an upgrade to your current laptop or desktop, you’re often bombarded with technical jargon. What is hyper-threading and how do you tell if your clock speed is any good? How can you tell the difference between an Intel Core i3, i5, i7 and i9?

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