Figuring Out Temperatures

[GrayT]

I have 3 temperature sensors that I can monitor within SpeedFan. Only problem is, my second sensor I don't know if it's a case temperature, or a motherboard temperature. Is there such thing as motherboard temperature sensing?

The motherboard is an Asus A7V600-X. The first sensor is a CPU sensor, second is either motherboard or case sensor, and third is a HDD sensor.

Only reason I don't exactly know is because the second sensor reads 38°C and the CPU sensor reads 39°C both at Idle. It would seem those are a little too close to each other to be considered case temperature. Heres a screenshot, not sure if it matters but oh well.

This was the CPU under full load for about 10 minutes, the second sensor I have labeled right now as (Case) doesn't even budge!

 

[Codeine]

Looks fine to me, cpu temp and case temp both affect each other hella lot. They can be that similar, Im guessing you have a nice room temp.

 

[GrayT]

Hmm, well thanks. I've just never seen a case temp and CPU temp so closely related to each other.

 

[GrayT]

Also, SpeedFan detects a fourth ISA bus sensor, which reads at -1°C. What the hell could possibly at -1°C in there?