Lesson learned: dust can, at least on occasion, have a positive effect on your computing experience! Did wonders for quieting down my BTO Radeon 9800, as it turns out. I, like a lot of the other people who bought early G5s, was impressed with how quiet it was and very disappointed at the piercing whine emitted by the fan on the graphics card--it easily makes more noise than Apple's seven fans put together. Anyway, I recently realized that at some point during the past 10 months I stopped noticing the fan noise. I remembered the whine being a lot louder, but I figured I'd just gotten really good at tuning it out. Then (unrelated) I took a can of compressed air and blew all that nasty dust out of the guts of my G5. Boy, was there a lot of dust in the 9800 heatsink. Dust, it turns out, that was somehow damping that annoying whine by about a factor of five. My whine is back, and again I find myself tempted to go buy a newer card from ATI with a quieter fan or one of those do-it-yourself quiet fan kits. But, give it a few months and maybe the dust will take care of it again.