Just gonna throw my 2 cents in re: ECC memory & LGA1700:
I have a Raptor Lake 13600K, an ASRock Industrial IMB-X1314, with W680 chipset, and 4x Kingston KTL-TS432E/32G. The CPU, Motherboard, and memory are all capable of ECC. Support is explicit for all of these pieces of hardware.
However. There is no EDAC module for Raptor Lake CPUs on W680. Which means as much as I have hardware support, there’s no module in the Linux kernel to surface bit errors and correct them.
You can verify this on your own systems by proceeding to the directory /sys/devices/system/edac/mc – if there’s no mc0 entry for your memory controller, you don’t have ECC support.
I’d love to be corrected if needed, but this is my understanding. ECC support isn’t easy to come by cheaply.