What NVidia calls a core and what Intel calls a core really aren't comparable. If you go by the Intel definition which is more or less "Capable of independantly issuing an instruction" then you might find 15 cores in a Xeon versus 24 SMM "cores" in the top NVidia chip. Going by the NVidia definition which is more or less "Things that can execute instructions from a queue" NVidia would have 3072 cores in it's top chip and Intel would have 120 cores or "execution ports" as they call them.