OC’ed? Yes. The i7 990X is basically a CPU sold for that purpose, only.
Second hint: My tests included a full round of stock conditions trials, following exactly the same methodology. Absolutely the same effect observed. Just at different capacity levels. Again, please excuse my brevity here, as I said I have a good amount of documented evidence of my tests. So can tell you OC’ing did not influence the overall observation.
In return, could I now be humored and explain what kind of mysterious trouble OC’ing may cause? Is that what you’ve heard or is it your personal experience? I’m not trying to be a prick, I’d just much prefer to speak in clear(er) terms that can lead us, the conversation, this thread, to somewhere helpful and meaningful.