Sensor question?

[mrlayance]

I just downloaded MBM5 and there are 3 sensors, I know one is the CPU temp and one is the case temp. What would the third sensor be?

 

[L00PY]

MBM gives you the option to work with as many sensors as your mobo supports (or maybe just 3). Some mobos don't have three sensors. Some allow for a place to plug in for external sensor readings.