WE spoke with many developers including some big names and we learned that they can’t make much sense out of quad or more core CPUs. They confirm that they can put two cores to good use but not much more. The main problem is that the performance is far from scalable.
You have to spend both time and money to resource the programmer to try to make sense out f the dual core CPU. It takes up to a year to optimise the game for more threads and even if you make the perfect job you can count on twenty to thirty percent performance increase, and this is the best case scenario.

Once you start making the multi threaded game you end up making and having the multithreaded bugs as well.