What causes instant-reboot?

My problem is, that sometimes my computer restarts itself without any BSoD, error message or anything at all.

Event viewer says it was just an unexpected shutdown.


It happened very rarely before, but now with one game I can't even start it without having my lappy restart. (I have reinstalled the game quite a number of times now)

I understand it's somekind of a graphical effect what causes it, because it only happens when gaming.

(And no it's not an overheating problem as gpu doesn't go over 75~80 usually)

I have tried diffrent drivers, CCleaner, TuneUp cleaner and if I won't find a fix in 24h I'll do format. =x

I'm using Windows Vista Ultimate 32bit.

Any ideas?

 

Me thinks your RAM is going bad, or it could be the graphics card itself has faulty RAM. One way to test the memory in your system is with a tool called Memtest86+ which can be found here.

Edit: Just remembered that Vista itself has a memory diagnostic tool that can be found in the Control Panel.

 

Thanks for the reply.

Just did the Vista Memory Diagnostic tool and it sayd everything is fine, no problems at all.

 

Or it could likely have once of the faulty nvidia graphics cards.
If you haven't heard about it you can find out here
http://apcmag.com/nvidia_disaster_thousands_of_gpus_faulty.htm
and NBR has its own threads about the issue

 

If every other game works just fine then it's clearly not a faulty card.
But thanks for your input. ^^

 

well not true, could just be chance.

 

Okay, I found the mistake .. it was overclocking, I just heard some games are very unstable with overclocking. : o