Hi,

my MSI GTX 660 Twin Frozr runs at 30°C in idle but I can't get the cooler below 30%, that is 1100rpm, with Afterburner. I guess that minimum level of 30% is enforced by the BIOS, so, would a BIOS flash be the only way to get below 30%? How risky would that be?

Regards

It's not a given tha the fan controller could hardware run the fan any lower, and I haven't seen people being able to modify a cards BIOS other than clocks or voltages nowadays. It's unfortunate because with todays low idle power consumption and cooler design there are many cards that could turn off the fan(s) completely during really low loads. Fortunately the fans shouldn't normally be audible in most cases at around 1100 RPM. Send MSI some feedback for future consideration if nothing else.

In some cases, you can modify the vBios to accept going lower... but try to research as i personally dont recommend messing with vBios, but i have seen some that have modded my card to be able to idle the fans lower.