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Samuknow 24th September, 2008 05:45 PM

PC shutting down
I figured I would go ahead nad post this. My PC shuts of abruptly from time to time. I have a Tuniq miniplant 950 PSU so i know it is not that. I was having the same issue with an ultra 550. It happens in the middle of the night or when i am away. I gamed last night for about 2 hours and it was fine. I woke up this morning to find it shut down again. I thought it was folding on both GPUs that was doing it. I tried not running FAH at all and it still shut off sometime during the day yesterday. I am going to pull one of the video cards to see if I have a bad card. I will switch them out if it still happens. Anyone have any other ideas?

PorPorMe 24th September, 2008 06:10 PM

How long has it been since you checked if your OC was stable? Something might have weakend a bit.

Edit: and don't assume your PSU is exempt from the list! cc reminded me that $30 part or $300 part, any can fail.
Edit agian! forgot that you had used another PSU and got the same result.

ThunderRd 24th September, 2008 06:15 PM

Do you have all of the crappy overheating features turned off in the BIOS? If not, turn them off or set the thresholds higher. You know best how high is too high for your own rig.

Is there any other monitoring soft running that has some overheat protection?

Only time I have ever had that sort of problem is heat somehow-usually CPU.

Samuknow 24th September, 2008 06:22 PM

I had it at stock on the gpu and cpu and it still does it.

I tested my psu with a meter and a scope. Believe me, it is fine. You will not find more stable rails or voltages.

I made sure after I set the bios back to stock I turned all that crap off. Temps are 31/32 CPU and 35/35 GPU idle. At load i hit 42/43 CPU and 44/44 GPU. temps are not it. I have been dealing with this for a while. It is very random. It happened before I changed cases or power supplies.

I am going to pull one of the GPUs tonight and see if it still happens.

Daniel ~ 24th September, 2008 06:52 PM

Motherboard still under warranty? ...I'm just saying...

Samuknow 24th September, 2008 06:52 PM


I am thinking that or the cpu.

But will try the video just to rule it out.

Daniel ~ 24th September, 2008 07:12 PM

What else can ya do!? Good luck with the elimination rounds!

Samuknow 24th September, 2008 08:54 PM

Thanks. the good thing is, it is not affecting me very much. It runs for hours and I can still game and do my other computing needs. It is usually after several hours that is shuts. I have tried loading it to death by running 2 gpu FAH clients, another FAH client for the other core, and running 3d mark. (man is that choppy with the GPUs loaded down). It never shuts down. I have tried stock and OC to the stinking max. I did find the limit on where the GPU clients will start to fail on my cards. I can't actually make it do it. It just decides it is done running and stops.

Daniel ~ 24th September, 2008 08:58 PM

Had the same thing with my P5W DH, was a great board with the dual core...but went flaky from the day I installed a 4 core, finally gave up on it as a 4 core it to Patti! ":O}

Samuknow 25th September, 2008 12:36 AM

It appears I either have a bad power cord or my battery backup is toast. I plugged in another computer that gave a quick arc and my pc shut off instantly. I plugged it into another APC surge suppressor not my battery backup. Both however, are plugged into the same outlet. Everything else stayed on. It must be a quick enough burst that just the pc sees it. I will switch some stuff around to see if it goes away.

PorPorMe 25th September, 2008 01:04 AM

You are lucky to spot that one! An intermintent power problem would be the hardest to spot. Good one!

Samuknow 25th September, 2008 11:15 AM

After changing the power connection to a different place, my computer was still running this morning.....YAY.

PorPorMe 25th September, 2008 11:49 AM

Good one!

IceRaptor 25th September, 2008 01:16 PM

Goodjob :thumbsup:

Daniel ~ 25th September, 2008 06:12 PM

I like the price on that repair as well!! ":O}

Samuknow 25th September, 2008 09:00 PM

All I had to pay was a little bump on my noggin. Well worth it.

MrSeanKon 30th September, 2008 07:32 AM


Originally Posted by Samuknow (Post 481382)
After changing the power connection

My LG TFT monitor did not turn on when I bought it!
Simply I changed the AC cable....
Seems strange but it is not :D

Samuknow 30th September, 2008 11:11 AM

It seems to be a pretty common issue. We must remember KISS.

Keep It Simple Stupid. And I am not referring to you as stupid. But when trouble shooting, look for the simple things first.

Daniel ~ 30th September, 2008 06:16 PM

OH! Lose power cords scare me all the time! I find them right away, but a nasty 30 seconds to 3 mins depending how fast my heart is beating...":O}

booman 2nd October, 2008 08:10 PM

So the outlet was overloaded or just going bad? I've had breaker issues with my new office because I'll run 4 computers on one circuit and the breaker finally died. My contractor replaced it and all my computers are back up again.
I was thinking UPS also.
Glad you got it worked out, funny when a headache turns out to be a simple problem

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