Download three programs:
- GPU-z (to monitor the graphics processors temperature under idle/load)
- RealTemp (to monitor the processors temperature on idle/load - the TJ Max is automatically set to 100)
- EVEREST Ultimate Edition (to monitor the motherboard temperature on idle/load - look under ‘computer’ -> ‘sensor’)
If a computer shuts itself down while it’s under load then that means you’ve reached a thermal threshold of a certain component, this is usually caused by either the processor or the graphics processor. The motherboard threshold depends on the board, it usually ranges from 65 C to 85 C.
Once you’ve found the component which is overheating, get a can of compressed air and clean the inside of the computer (especially the heatsinks and fans). Don’t use a vaccuum cleaner as they will generate static electricity which will fry your computer. When using the laptop make sure there’s enough room for proper airflow (don’t put it on a bed or something because this will block the airflow)
@ Level
Laptops can’t melt, the processors themselves would have to be over 2000 degrees, the plastic housing of a laptop is usually made of a type of plastic that gets harder when it’s heated - not ‘softer’. You should be fine unless you go over 250 C, which is impossible because there’s no component that will work even near that temperature.
edit:
Try to maintain these temperatures:
CPU: don’t go over 65 C for 24/7 use
GPU: don’t go over 85 C for 24/7 use
I wonder how warm your laptop would get if you let the CPU run Prime95, it would probably go way over 100 degrees (I suggest you don’t try that. :p)