well compared to a full gpu block for each card I own not so much, just have to get some quality ramsinks and some good airflow, let me know anything you find out John, Im pretty sure It will have no problems on my 7900gs or 8600gts, but with my 8800gt and 260s it worries me a little.
and yay Im now superclocked after beeing on these forums ove a year I no longer feel like a noob