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Celeron, Pentium, i3 and i5 series are getting new coffee lake CPUs from Intel.
Unfortunately, coffee lake CPUs work only on z370 motherboards and some CPUs aren't overclockable.
source: https://videocardz.com/74856/intel-core-i3-8300-and-core-i5-8500-appear-online-with-eta-14-february