Hi, I do (my first post) on k62 450 mb(video encoding) with waterfall. Got a 2nd hand board(sempron 2800-ecs via chipset). See that waterfall does not work well and cpu core temp (speedfan) is 37deg as compared to xp(32-33 deg).kcpu cooler seems not to run well with the amd cool and quiet driver.So forced to use xp. regards