Dolphin only reads one of my video cards: and it's the crappy one.

[AnyOldName3]

It isn't a time limit, it just gets too hot and draws too much power to sustain that speed, so brings it back down after a while, even if the same amount of work is being asked of it. That's why it's only a part time thing, not an overclock, and intel will sell something as a 3GHz with turbo boost to 3.3GHz processor, not a 3.3GHz processor. I can't exactly cite my sources, but what I wrote was a poorly worded mash up of things in other threads.