PP what do you mean? Are you suggesting that its better to set the clock speeds the same for all 3 modes? I think jusing having the OCs on for 3d will give my card a longer life, if not please explain why.
No if you change the clock all the time on anything it decreases lifetime. Dont take me wrong though its so little that even i dont mess w/ anything but the 3d performance tab. Just the same w/ OCing anything decreases lifetime but its so little that when it dies it will be way outdated.