Now now there is probably no need at all to revert back to the single core for the higher clock. because there are so many other things you can use dual core for, even though lockon only uses one core, you can still run Lockon Great. what matters is some of the processor's clock speed but also the Cache. the processor you have is good but if you want to upgrade stick with core 2 duo because of the insanly high cache ;) no need to go back to single core only if the one sole purpouse is to run lock on.. :P