Can someone explain these GPU temp readings?

GMSkittles

Reputable
Nov 12, 2014
5
0
4,510
I have quite an old GPU, but now I'm having some big issues with over heating. I play any game at all for about 10-20 mins and my entire computer shuts off - I think some people call it a TDR.
Have a look at this GPU-Z log, it's incredibly unusual and a bit dangerous.

http://host-a.net/u/Skittles/GPU-Z_Sensor_Log.txt

How can I fix this? One day, my pc has completely fine temp readings and another day it's dangerously high with fan speeds rapidly increasing. I really need to fix this so I can play some games ):

Basic PC info:
64 bit windows
intel i5 chip
Nvidia GT320
4GB Ram

PS: I can also provide some BSOD minidump readings if needed, but for some reason they have stopped being recorded some days ago.
 

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