PC restarts unexpectedly

[Sijan02]

I have a custom built PC of 3 years,.
Configuration:
Operating System
Windows 10 Pro 64-bit
CPU
Intel Core i3 4150 @ 3.50GHz 46 °C
Haswell 22nm Technology
RAM
4.00GB Single-Channel DDR3 @ 665MHz (9-9-9-24)
Motherboard
ASUSTeK COMPUTER INC. H81M-P (SOCKET 1150) 101 °C
Graphics
19M45 (1366x768@60Hz)
Intel HD Graphics 4400 (ASUStek Computer Inc)
Storage
465GB Western Digital WDC WD5000AAKX-08U6AA0 (SATA) 45 °C
Optical Drives
ATAPI iHAS324 E

Sice a few days my PC has started to restart unexpectedly. I installed Speccy, HW monitor to show the status, and they all are showing mainboard temperature of 101 degree Celsius. I kept my PC unplugged all the night and in the morning plugged it and run speccy,HWmonioitor they again showed the 101 degree temperature,where as my CPU temp is only 41 degree. Is the temperature correct and is it causing the problem? What'll I do??

 

[basroil]

Sounds like a VRM or two broke and the others are making up for it. Not much you can do if that's the case other than to replace the mobo. If you have a thermometer, try testing the VRMs to see if they really are above 60C