Really need help with my computer turning off problem.

Matson

Matson

Matson

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20 Aug 2009
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I seem to have an issue that my computer would just randomly turn off like someone has pulled out the power chord then it just restarts up again straight away. It used to only happen during games but its now started happening even when im just surfing the web.
Its definatly not a temperature issue because everything is at stock speeds and the temperatures are low. I formatted my computer and cleaned all the dust out and its still doing it.
I can easily produce this crash by running furmark with crossfire enabled as it would just shut down after a minute even though the temps are low.I managed to run it for 5 minutes with crossfire disabled.
I disabled crossfire for a while to see if it still goes off but i still get the same problem.
I'm wondering if this could be a power supply problem and its developed a fault?
I'm usually good with working out these types of issues but this one has me stumped as i dont see any graphic glitches or blue screens its just like somone pulls the power out then it reboots back up. Its doing it more regulary now too.

Any help would be aprechiated.

Im running 5870 in crossfire
i7 920
950w arctic pro power supply.
 
Nothing is overlocked, All at stock speeds. I used to have it overclocked and never had any problems. its all stock, fresh install of windows ect.
 
Matson said:
Nothing is overlocked, All at stock speeds. I used to have it overclocked and never had any problems. its all stock, fresh install of windows ect.
Click to expand...

Like I said, try running it with minimum things plugged in, using power. See what happens. I think it's an error with the PSU, I've had similar issues before.
 
NeverWinter said:
Like I said, try running it with minimum things plugged in, using power. See what happens. I think it's an error with the PSU, I've had similar issues before.
Click to expand...

Thanks ill give that a try. I think its a psu issue aswell but thats hard to test without buying a new psu and seeing if the problem is still there.
 
That psu should handle that with no problem, if you run single gpu will it reboot? switch gfx cards around and run one at a time to make sure its not a faulty gfx card.

I'd say it was the psu as well. What warranty is left on it?
 
No warranty left on it now. I did email Overclockes and they said i could buy a psu to test it and send the psu back if i still have the same issue and obviously keep it if it fixed the problem. With crossfire disabled it still goes off.

This is all i get in event viewer under critical..... I copied it from when it happened yesterday.

The system has rebooted without cleanly shutting down first. This error could be caused if the system stopped responding, crashed, or lost power unexpectedly.
Source Kernel-Power
Event ID 41
Level - Critical
User - System
Task catagory (63)
 
Iv just noticed something else too. I took out one graphic card as im going to run them seperate to make sure its not a fault card and one of the extra large fans on the back of the case isnt spinning. If i move it with my finger it spins a little like its trying to start but then it just stops. Could this be releated to the problem im having or would this be a different issue? Its Just an extra large fan at the back of the case.
Here is a pic showing the fan which isnt working. Its the one at the back.I can sort of get it working if i flick it round a few times but it doesnt spin fluid.
DSC06934.jpg
 
could be, can you disconnect the power from that fan you say the temps are fine and it hasn't been turning so having it disconnected won't affect them, but it may be causing your power shut off problems.
 
When my system randomly shut down like you say like somebody had switched it off & on again I just upped the volts to my CPU & Ram. It's not happened once since although it probably will now I've typed that.:p
 
I could up the voltage but why would that only suddenly become an issue now? iv had this computer for about 3 years now and when iv had it at stock its never done this untill now.
Im going to try the cards seperatly first to see if it still shuts off then i can pull the power out for that fan and try that.
 
I've had mine years mate before it started happening but don't care as the fix was Free.
 
UPDATE - Okay at the moment i only have one card in my pc and i managed to run furmark for the whole 15 minutes and it didnt shut off.
Normally it goes off after about 1 minute with crossfire.
Going to take this card out now and try the same with the other card.
That should eliminate it being a graphics card problem right?
 
Its all stable so far i have loads of internet pages up and a video running and so far it hasnt shut down. Will give it abit more time then take this graphic card out and try the other one.
 
random shut offs like you described usually point to qpi/vtt or dram not enough

can be gpu memory freq too high or unstable also so try with 200mhz less
 
Okay well so much for that it just shut off. I havent tryed the other card yet but with just this one it still shut down while looking on the internet.
 
Tryed both cards seperatly now and it went off with either of them so i think that means its definatly not a GPU problem.
 
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