If there is a smell of burnt electronics
when the PC
shuts down, then it's possibly the power supply
Crashes in games are also often because of faulty RAM sticks
. Try running a demanding game with only one of your RAM sticks
, if it shuts down again, then try one of the other RAM sticks
If you got a spare power supply
, or a friend in possesion of one, then try to switch the power supply
, and then you can determine wether it is the problem, or not.
Also try to listen the fan
of the power supply
, if it's very loud, then it's possibly because of overheating
I hope you get it going soon, good luck!