[koala]

You'll have big problems running an 8800 with Vista on a 450W PSU. In the meantime, try replacing your 7900GT's fan with a Zalman.

Before we get into water cooling options, enter your full system specs into this power calculator, and add 30% to the total to allow for PSU inefficiency.


EDIT: check out blackduck's reply about water cooling..... http://www.techsupportforum.com/f255/water-cooling-194587.html