Hmm, interesting. From what I remember, the voltage decrease that C-states are supposed to do are disabled when overclocking (or increasing vcore). So based on that, C4E is useless on an overclocked computer... Am I right?
And from what I gathered from the article, C1E and C2E are more or less the same, but C1E does it via software somehow, and C2E does more or less the same thing by sending a signal through a special pin on the CPU. So therefore, you might as well use C2E over C1E, given the option?
I have the option of C1E, C2E and C4E. I enabled both C1E and C2E, is this different from just enabling C2E? I wouldn't think doing the same thing via hardware and software methods makes much sense.