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Pc shutdown unexpectedly, help

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My computer would freeze or shut the restart unexpectedly, this happened after I took out the PSU to check the fan, cause it was heating up a little more than usual.

After I put it back in, and window says it detected a change in the hardware and asked to run the repair tool, then it showed a list of thing that it deleted.

I installed ubuntu 9.04 and it restart there too but whenever I try to convert video it would restart in less than a min in vista and ubuntu, but I was able to watch wmv files for about 1 hour and no restarts, rmvb file work too I watch a film that was 2 hours long.

With avi it restarts at about 10-15 mins and mkv under 5 mins

in vista wmv and rmvb files restarts in random times, but avi and mkv is the same us ubuntu.

I run prime95 in vista, the first time I was able to run it for 15 min then it froze, I tried it 4 more time but they all froze in less than a min

I check the psu's voltages with speedfan

Vcore1 : 128v
Vcore2 : 3.02v
+3.3v : 3.33v
+5v : 5.11v
+12v : Fluctuates min that I have seen is 5.25
-12v : -1.75v
-5v : -4.15v
+5v : 5.11v
vbat : 3.17v

and at temp 2 shows 127c,
is this an error, and which part could this be?

With CPUID hardware monitor everything is the same except the

-12v shows min = -11.90v max = 11.71v
+ 12 show min = 4.22v max shows 13.63
And there was no hardware that has 127c everything was normal
in the bios the +12v is 11.77v

I tried out a old psu that came with the prebuilt pc and the voltages are the same. I reinstall vista on a new hdd but it still the same.

is this all the psu's fault, or is it the motherboard or cpu is damaged, is there a way to make sure which is causing the problem?


thanks

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you could try looking at the mobo's capacitors - look like little usually black barrels with silvery tops - there are lots of them near the cpu. If you see anything that looks like brownish goo oozing out the top of the capacitors, the mobo is warning you that soon it will completely die - if no goo, perhaps something else.

double check all connectors like psu to mobo, reinstall vid and ram make sure physically correct installed

check the power plug to wall and psu = that would be nice.

check all connectors. you can try changing cables to hdd if you have extras

make sure hsf is secure and contacts cpu properly for cooling

lots of basics like that

volt reading may be off a little and no big deal - common actually, also minor flux.

it could be something stupid or something more serious like mobo or psu

check thermal paste on cpu. - if it's old replace - do that while checking contact, and reinstall it too

it will eventually reveal itself - mine did, it took a month, and the mobo blew the caps.

watch for other signs of heat stress. some of the stuff you describe is heavier load which makes more heat

make sure all fans are turning

etc

if you have alt psu, try that

If 12V drops that low, Psu should shut down. If PSU fan failing it can cause overheating. What spec? What PSU, make/model? Check you have plugged ALL required cables into motherboard, and that they are firmly attached.

Mike.
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sorry accidentedly press submit

took out heat sink and fan, the thernal pasta is still there

I plugged every thing back in made sure they are firmly attached, I plugged the 24 pin, the 4 pin into the mobo

all the fan are working, the psu's fan is seem to be fine, the psu is called extreme power Duo, [rp -650 - pcap], 650w, made by cooler master


the psu i'm using now I bought 8 months ago and it's been working fine, I tried out the old psu that came with computer and the voltage reading are the same and it also restarts.


the temp fron CPIOD Hardware Monitor are
idle prime95 stress test
Core 1 = 45 60c
Core 2 = 45 60c
GPU core = 52 52
HDD = 38 43
TMPIN0 = 41 43
TMPIN2 = 39 53
THRM =40 40

speedfan show about the same except there is a 127c at temp 2 which never changes

RealTemp_3.00

idle prime 95 stress test
core 1, 2 = 53c 65c




thanks all the help

I kinda like how we are doing this fundamentally - regardless of what sys you have.

2 psu's = same result = it's not psu. (or they are both dead?) nahhh.

It really seems heat related or contact related - intermittent contact, short circuit - really just guessing.

That 127 degree thing is bizarre - can you use AOD with this sys just to get the volts and temps readings? I am NOT suggesting you go ocloxing at this point - lol/ but there's a lot of info in AOD. OR there's other utilities.

These problems - the rig I run now is resurrected junk. It has unknown intermittent problems - like it cannot find the o/s half the time on boot. But it does eventually, and it sometimes always does. but that's my junk sys.

These things are hard to figure out. The simple basics are often to blame, so we checked all that, it seems.

It would be nice if it all started when you made X change.

Have you done a memtest??

yeah i did a test with memtest86 omn both 1g ram 8 pass each, no error


sorry i don't really understant this

That 127 degree thing is bizarre - can you use AOD with this sys just to get the volts and temps readings? I am NOT suggesting you go ocloxing at this point - lol/ but there's a lot of info in AOD. OR there's other utilities.

thanks

I just cleaner the dust in the heatsink and fan and the temp drop by 5c

I tried out the same prime test again, it run for 25 mins then it restarted, I tried to convert a video it froze in less than a min.

the cpu been over heating for over a week now, would that have damage the cpu.

thanks for the help
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