Well technically you're both right. Its a 2-core DUO, so as far as I can tell, its two TRUE cores, but split up to effectively equal 4 cores(?) When I open up my system activity monitor, 4-"cores" show up as opposed to the two on my old Mac Mini The processor is hyperthreaded. Essentially, this means duplicating the parts of the CPU which feed information in the parts of the CPU which do the actual calculating. The idea is that, since the calculating parts spend most of their time waiting around for information to be fed into them, the parts which feed the information can take advantage of the idle time to get more work done. We will have to wait until the CRJ ships to see how well the hyperthreading works.