Are three cores better than two?
Barbarian writes "That's the question that Tom's Hardware asked. They took a dual-cpu motherboard and stuck both a single and a dual core Opteron on the board, for a total of three cores. Does it work? Well, yes, when it's not crashing. It does raise the possibility of tri-core processors whilst we are waiting for the next die shrink."
Symmetrical multiprocessing refers to the equality of each CPU in terms of running jobs. Each core has equal opportunity to schedule and execute a thread. The fact that the individual CPUs are different has nothing to do with it.
But thanks for playing the Demonstrate Your Ignorance Of Terminology game.