This is a fairly interesting piece of news coming from a Bit-Tech interview with Asus, though Tweak Town has pulled out the more interesting points. This year both AMD and Intel have launched new CPUs and new platforms for them, but while AMD has gone to a completely new design for its processors, requiring a new socket, Intel's Z270 and Z370 platforms both use an LGA 1151 socket. One would somewhat expect then that the Z270 platform could support the newer Coffee Lake CPUs, but these are instead confined to the Z370 platform.
What Bit-Tech learned from its Asus interview is that this incompatibility is a decision of Intel's, and not a physical limitation. The Management Engine (ME) and BIOS would need to be updated, but if this were done, Z270 would be able to support Coffee Lake. The Asus representative also states the power delivery for the CPUs does make a "little bit of different, but not much." There were approximately 20 pins unused on Z270, which are now used for power control, but the representative suspects they are needed for future high-core count processors.
Following these answers, the Bit-Tech interview asks about who Z370 is targeting, and the representative says it is logical that those "on Z270 don't need to upgrade." Those with older systems looking for improvements to power efficiency, clock speeds, core counts, and storage could benefit from the upgrade. The target for the Z370 platform is "anyone that wants or needs to buy a new system."
Source: Bit-Tech and https://www.tweaktown.com/news/59584/asus-z270-platform-work-coffee-lake-cpus/index.html
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