Thank you - i am looking forward to getting some of lifes hardware questions answered in here - combined with this answer and pyschoteddy's answers i have what i need - thanks all
Your welcome, and I think that you can give to the temps range a little more size, 80ºC max.
I tried OC'ing mine a while back and was getting artifacts at around 90C so I'd be careful. Then again, I think that may have been a faulty card, too. I can't remember if that was the one I RMA'd or not... Hmmm... (scratches head)
Don't forget set your fan profile with afterburner, that increase the fan speed at the same time that temp rise.