That's probably your core temperature and it's too hot. Is your CPU fan spinning? Either your fan isn't spinning or the cooling system is inadequate. You may have to reinstall your CPU cooler or buy a better one.
I'm also confused about TMPIN2 reding 6 C. That's freaking cold. I can't imagine any part of your case being that cold. I suspect that monitor isn't working all the time.
Hmm this is quite unsual with gigabyte hardware. I think this probably isnt the motherboard failure however its the cooling mechanism. Its seem your cooling system is not good enough or just not working. Make sure all your temperature sensors are working as maybe the cooling system is not detecting the rise of temperature. I agree with eightdrunkengods in the fact that maybe you need to re install your CPU cooling system.
Im also very confused and am amazed that any part of your case being that cold as eightdrunkengods said, your moniter probably isnt working all the time.
3 Columns are : Current value, Max temp. and Min. temp.
If the columns really are actually Current, Max, Min, then something is wrong with your temperature monitoring hardware or software. Your "Min" temps are higher than any of your other ones. Current, Min, Max would make sense.
Well, the good news is that all your other temps look fine. Your "Core" temp (in Speedfan) is obviously not correct but that happens sometimes with certain processors and motherboards. Mine reads 0 C all the time. Anyway, your Temp2 (speedfan) is essentially the same thing.
Either your CPU fan isn't spinning up enough to move air over the heatsink (unlikely) or the CPU cooler is making poor contact with the CPU.
I think you need to re-seat your CPU cooler. This will involve taking your cooler off, cleaning the old thermal compound (if there is any) off of the CPU and the cooler, applying new compound, and reinstalling it.
If you google "how install AM3 CPU cooler", you'll find some tutorials. You can use rubbing alcohol to remove the old thermal paste. Just be careful and make sure everything is good and dry before you apply the new paste. You can buy thermal paste at computer stores or maybe a local best buy. "Arctic Silver" is a common brand of paste.
Luckily, none of this is very expensive. Arctic Silver is really cheap and even if you need a new cooler, you won't be out very much $$.