This, what sometimes happens as a result is intel or nvidia sells a chip that "technically" is quad core, but they sell it as a dual because the tolerance is no

This, what sometimes happens as a result is intel or nvidia sells a chip that "technically" is quad core, but they sell it as a dual because the tolerance is not there, and what some modders figured out was a way to turn those two cores back on, essentially getting a slightly less reliable quad core CPU for really cheap.