I'm fully up-to-date on my Crosshair VIII Hero, but I've found no option in the BIOS to modify the chipset fan curve at all. Plus, every time I look at its status in HWInfo, it's spinning madly away at about 3,000 RPM (at idle it seems to stay around 63 C). Of course, it's quiet enough in my case that I don't hear it at all. So, I really wouldn't notice if it stopped. But, I don't think it does.