Gamers Nexus tested Intel's warranty process. Basically you just tell Intel you didn't use XMP and they'll either offer to replace your processor or issue a full refund. In their tests, there was only one time where neither was offered via support chat, but they reentered queue and got the offer. They were 3/3 over the phone and 4/5 over support chat. They tried to get denied in one of the chat conversations, but eventually got offered a refund. It's really dumb we have to lie, but it's still easy to get around.