This message was posted on behalf of Intel Corporation
We received your inquiry and I understand that you are looking for information about RAM supported for your processor. Please accept our apologies for any inconvenience this may be causing. We will be more than happy looking for a solution.
According to the Memory specification of the Intel® Core™ i7-8700K Processor, the only memory supported is DDR4-2666, you can check this information at the following link: