Coffee Lake S will be launching alongside the brand new Z370 chipset which is known as CFL-PCH (Coffee Lake PCH). The platform will feature the LGA 1151 V2 socket so while it will have the same number of pins as the current LGA 1151 socket, it seems like Intel is moving to ditch support of the Coffee Lake CPUs on older LGA 1151 socketed motherboards such as Z270 series. It is stated that Intel will clearly be differentiating the socket with the use of “V2” moniker so consumers don’t end up buying the wrong board for their Coffee Lake desktop processor. via Wccftech
Intel has been doing this for ages while AMD likes to go long on their sockets, but for the first time in a decade AMD is truly competitive with Intel. By requiring a new motherboard, there's no cheap path to upgrade, and every reason to compare Ryzen vs Coffee Lake price vs performance, with the added benefit that Lisa Su confirmed current Socket AM4 boards will be supported through 2020 with Zen 2 and Zen 3.