13th/14th are pushed harder they also allow higher memory frequency much higher with 14th gen.
12900k was competing with the then much older 5000 series AMD stuff the 13th generation was competing with the 7000 series which intel wanted to beat in benchmarks which is obvious by them allowing no power limits. They since made updates to how bios handles them but for some the damage is likely already done. Some cpus might not like the more conservative bios settings out of the box who knows.
But honestly it's all just a guess. I also think while an issue it's being blow out of proportion probably rightfully so.
IMHO trust is a big thing. If a machine does not do its work reliably, it is not a machine worth having. Downtime and troubleshooting are costly and frustrating. That's the same reason why I spend days upon days validating my tweaks and over/underclocks before I deem the machine "production ready". If a processor cannot be trusted even in "fail safe settings" in conjunction with a enterprise-grade chipset such as the W680... then it's simply a bad and undesirable product, I'm afraid.
I'm hoping Intel takes the issue more seriously.
If I'm not mistaken, W680 supports ECC on the 'consumer' CPUs.
Yeah I think it's a limitation of the Z SKU, actually. I just read the feature chart, the W680 supports both overclocking and ECC, the Q670 removes overclocking support. In hindsight, why are high-end motherboards even using Z690 instead of W680 then? Odd.
ARK states 13900K is compatible with ECC when used in conjunction with W680 chipset.
