EasyTune seems to be the only way to change that, but it seems to be buggy (if I'm reading this correctly, it drops the fan speed to 0% (there is no slider for that at all) if it gets to 86C and ramps it up to 100% if it gets to 78C.)
First, my build:
CPU: Intel Core 2 Duo E8400
Motherboard: Gigabyte EP45C-UD3R
GPU: ATI HD 4870
Case: Cooler Master RC690
Fans: The fans came with the case. One has a 3 pin connector and is connected to a 3 pin slot on the motherboard. Another has a 3 pin connector and is connected to a 4...