It looks like ECC is supported on K series processors according to Intel Ark. https://ark.intel.com/content/www/us/en/ark/products/230496/intel-core-i913900k-p

It looks like ECC is supported on K series processors according to Intel Ark. https://ark.intel.com/content/www/us/en/ark/products/230496/intel-core-i913900k-processor-36m-cache-up-to-5-80-ghz.html https://ark.intel.com/content/www/us/en/ark/products/230496/...