ahhh, the joy of lm_sensors? Chris, you need the i2c module to be compiled in kernel before the sensor modules will work. If you are using, 2.6+ i2c support is already there. Install lm sensors application and then as root, sensors-detect will walk you through it. Different motherboards require different sensor modules to be loaded. My ecs was basically a honey, my old MSI board had a glitch and I had to go bug hunting (there are two modules which interfere with each other, all worked out now).