Eli5 What’s the main difference between processors used for servers and those used for gaming?

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Why can’t I use a processor made for heavy servers in a home pc ?

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Server CPU’s generally have very many cores running at slower clocks to be nore efficient and produce less heat, so they can do **lot’s** of calculations at the same time, called multi threading, this is particularly useful for server applications as well as productivity work (video/photo editing, CAD software, simulations, animation etc.).

However games are largely single or low multithreaded, meaning the calculations needed for a game have to (mostly) be done one after the other anyway, so there’s not that much benefit to having many CPU cores, and instead gaming CPUs tend to focus more on single threaded performance and higher CPU clocks as well as better overclocking (making the CPU run faster than it’s native speed at the cost of thermal and power overhead and efficiency).

Ultimately both are interchangeable, it’s just that they’ll not perform particularly well if they’re not used in their intended roles, because that’s not what they were optimised for.

Also, because companies have deep pockets, server CPUs tend to be absurdly expensive, easily costing in the 5 digits.

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