What's the Fan Noise on a Mac Pro?

On any computer, there's definitly no fan noise at all. The only time the fans would really kick in is either a longer export, which we didn't do many of, or the trans codes deftily. And now with a mac pro, i don't think i've ever heard the fanc and it's actually like, on a table next to my desk, kind of ear height. So e tit's greato astrs, it was.