Intel i3 7100 (Kaby Lake) already has a stock cooler.
All Kinds of K Versions Intel CPU (only talking about Kaby Lake) do not come with stock coolers for (intel i3-7350K, Intel i5 7600K, Intel i5 7640K, Intel i7 7700K and Intel i7 7740K - Non K Version will always come with Stock Cooler
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Intel i3 6100 (Skylake) is not Kaby Lake