It is an engineering sample release. Therefore, the clock speeds are Slightly lower (hence the Cheaper price). It goes up to 4.1ghz all cores turbo Compared To 4.6ghz for the retail release. This is not overclockable CPU.
It has 8 cores and 16 threads and it is consistent with the socket 1151 (Z370 / Z390). The item \, processors \The seller is \This article can be shipped worldwide.