It could be the chipset temperature. You could try touching the big heatsink on the motherboard to verify.
I strongly suspect that it is temp monitoring software error. Not sure what you are using. Tried CPUID HWMonitor that has a similar interface to yours and my TMPIN2 reading is 128°C on my Crosshair IV. Using Asus PC Probe II, I don't have any overheating problems. I don't smell anything burning either.
I recommend using Asus temp software that is compatible with your motherboard from Asus's website.
"Believe me! The secret of reaping the greatest fruitfulness and the greatest enjoyment from life is to live dangerously!"
Friedrich Wilhelm Nietzsche
Since the ASUS M3N78 PRO makes use of a nVIDIA chipset,
I would suspect the chipset.
Those chipsets generally tend to run even hotter than those from AMD.
With that said,
Perhaps the chipset heatsink is not making full contact.
May want to clean off the chipset heatsink and re-apply new thermal compound.
If not the chipset,
I would then suspect the MOSFETs.
Ok, first off, ty for the responses. I checked the clipset heatsink by touching it and its not that hot. I also realized the after leaving the computer off for many hours and starting it back up that the first thing I opened was speedfan and it was already reading 127c and it never changes, not 1 degree. I also got cpuid hm and theres no temps being reported anywhere near that. And I've had probe II from Asus which shows all is good. But reason I look at speedfan is because I wanted something the show the temp. in my system tray, miss motherboard monitor .
Anyway now I'm leaning toward I software issue for the crashing issue, like leftover ATI driver stuff from my old video card, RIP. I may try to format my hard drive and do a fresh re-install but damn, I got 1.5 TB hd and a bunch of stuff on it.
Very funny Scotty, now beam down my clothes!
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You probably already have, but consider running CCleaner to get rid of temp files and other accumulated detritus. You might also run the registry cleaner aspect of it.
Running something like Driver Cleaner will help get rid of the old drivers.
If it does not move it's likely just a false value and nothing to worry about. I have a reading on my motherboard which always reports 60C and on some rare occasions goes to 120-something C, triggering an alarm in some monitoring apps. The only solution I found is to disable monitoring of that value in the software where possible.
In CPUID Hardware Monitor that wonky sensor is listed as CPUTIN, but the actual sensor reporting the CPU socket temperature is SYSTIN and the chipset one is labeled AUXTIN
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