I use ATItool to underclock my 9800xt from 412/365 to 225/250 for 2D and it'll load the default for 3D stuff. I've found probably around a 5C temp drop and it lets me run the fan at its minimum while still staying cool enough. Doesn't do anything for the voltage though.

I underclock my 9800xt from 412/365 to 225/250 in 2D. If I go much lower on the core, atiTool shows artifacts so that'll have to do. It runs quite a bit cooler, but only cool enough for me to run it with the fan on minimum...still needs the fan.

Wow, those guys are dfi-street are crazy. Just for reference, I'm running a p4 3.2C mildly overclocked with a 9800xt, a gig of ram, dvd burner, hd, fans, sound card, etc...on a seasonic 250W! your cpu takes a similar amount of power, your video card may take slightly more but not way more. I think y...