As part of my upgrade I'm moving to a mobo with PCIE video. The 6800 GS was a easy quick choice and arrived today (a-la-newegg). On examining the card, to remove the heatsink it comes with and install a zalman 700 would be quite a task, and may be irreversible. Has anyone an opinion on the relative loudness of the card (I can't install it yet because I haven't swapped out my old mobo yet)?