I've noticed that my recently acquired 4870 appears to be switching constantly between idle clocks and full clocks when it's meant to be idle, and the memory isn't clocking down at all. Is this a fault of the 10.6 drivers, or is it something else running in the background? I've also noticed the card still gets quite toasty when idle, but having the fan at 40% all the time cools it down (at the expense of noise). So, is there any fix for the cycling clocks? I'm thinking it should make the card run cooler when idle, so I can turn the fan down a bit.