Read the first two pages of this thread before questioning the whether the RMAs were legit or not.

CPU dying on stock by only shutting a couple of cores off sure as hell sounds as legitimate RMA to me.
As does to all guys who got the CPUs which suffer from the same phenomenon. Whether they applied excessive voltage
is irrelevant. They were unable to shut cores off from the beginning, therefore it limited the CPUs functionality, regardless
of whether disabling any of the cores seems reasonable or not.