During game time, at certain points (will explain later) my pc completely crashes, no blue screen or anything, it just completely shuts down. To reboot it, I have to either 1) press the power button for a while , release and press it again 2) restart power supply.
The phenomenon occurs at certain points of the games (for example, in Dota 2 it occurs when "Radiant side" looses) but it has also occured once or twice in random times.
In Skyrim and Borderlands 2 it also happens, but I haven't been able to specify when it happens.
What I've tried to do :
a) Opened the pc case and cleaned it many times.
b) Changed the thermal paste to CPU.
c) Updated graphics card drivers, updated OS.
d) Reinstalled the games.
e) Checked temperatures via speedfan and by myself (mostly touched the case) - All ok.
f) Asked at the forums of the games - no answer. (I even sent a letter to a magazine, no response)
Is there any way I can resolve the issue? I will get a new machine in 4-5 months , but I wanna send this one to my cousin back at home , so I want it to be able to run some games properly.
This sounds like the PSU. Capacitor aging may have taken it down. That's also a possible fate of the mobo. Go over it closely looking for bulging or leaking capacitors. Google "bad capacitors" for some images.
I had a system with an 8800GTX start doing that to me. I replaced the GTX with a 6770 (stopgap til I bought my current setup) and it stopped doing that. Was never able to pin down if the GPU itself was the problem or if getting a lower power card masked the fact that my no-name PSU was dying.