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#1 2010-11-21 07:01:56

thom_raindog
Member
Registered: 2008-04-29
Posts: 175

PC dying suddenly

Howdie,

I hope this is the right forum section, I AM looking at a hardware problem after all (for all I know)...

My wifes PC keeps turning itself off. From one second to the other, no shutdown, no reboot. Now, I am half expecting some kind of heat problem, so I fired up lm_sensors again, and this is the read I get:

sensors
k8temp-pci-00c3
Adapter: PCI adapter
Core0 Temp:  +59.0°C                                    
Core1 Temp:  +64.0°C                                    

w83627dhg-isa-0a10
Adapter: ISA adapter
Vcore:       +1.19 V  (min =  +0.00 V, max =  +1.74 V)   
in1:         +0.73 V  (min =  +1.86 V, max =  +0.58 V)   ALARM
AVCC:        +3.31 V  (min =  +2.98 V, max =  +3.63 V)   
+3.3V:       +3.30 V  (min =  +2.98 V, max =  +3.63 V)   
in4:         +0.96 V  (min =  +1.63 V, max =  +0.53 V)   ALARM
in5:         +0.98 V  (min =  +1.34 V, max =  +0.59 V)   ALARM
in6:         +1.10 V  (min =  +1.42 V, max =  +1.71 V)   ALARM
3VSB:        +3.28 V  (min =  +2.98 V, max =  +3.63 V)   
Vbat:        +3.02 V  (min =  +2.70 V, max =  +3.30 V)   
fan1:       1328 RPM  (min = 1222 RPM, div = 8)
fan2:       1430 RPM  (min = 24107 RPM, div = 8)  ALARM
fan3:          0 RPM  (min =  685 RPM, div = 16)  ALARM
fan4:          0 RPM  (min = 1041 RPM, div = 16)  ALARM
fan5:          0 RPM  (min = 8544 RPM, div = 2)  ALARM
temp1:       +35.0°C  (high = +85.0°C, hyst = +21.0°C)  sensor = thermistor
temp2:       +56.5°C  (high = +65.0°C, hyst = +65.0°C)  sensor = diode
temp3:        +2.5°C  (high = +80.0°C, hyst = +75.0°C)  sensor = thermistor

And a minute later this:

sensors
k8temp-pci-00c3
Adapter: PCI adapter
Core0 Temp:  +57.0°C                                    
Core1 Temp:  +64.0°C                                    

w83627dhg-isa-0a10
Adapter: ISA adapter
Vcore:       +1.19 V  (min =  +0.00 V, max =  +1.74 V)   
in1:         +0.73 V  (min =  +1.86 V, max =  +0.58 V)   ALARM
AVCC:        +3.31 V  (min =  +2.98 V, max =  +3.63 V)   
+3.3V:       +3.30 V  (min =  +2.98 V, max =  +3.63 V)   
in4:         +0.96 V  (min =  +1.63 V, max =  +0.53 V)   ALARM
in5:         +0.98 V  (min =  +1.34 V, max =  +0.59 V)   ALARM
in6:         +1.10 V  (min =  +1.42 V, max =  +1.71 V)   ALARM
3VSB:        +3.30 V  (min =  +2.98 V, max =  +3.63 V)   
Vbat:        +3.02 V  (min =  +2.70 V, max =  +3.30 V)   
fan1:       1328 RPM  (min = 1222 RPM, div = 8)
fan2:       1442 RPM  (min = 24107 RPM, div = 8)  ALARM
fan3:          0 RPM  (min =  691 RPM, div = 32)  ALARM
fan4:          0 RPM  (min = 1054 RPM, div = 32)  ALARM
fan5:          0 RPM  (min = 8653 RPM, div = 4)  ALARM
temp1:       +35.0°C  (high = +85.0°C, hyst = +21.0°C)  sensor = thermistor
temp2:       +55.0°C  (high = +65.0°C, hyst = +65.0°C)  sensor = diode
temp3:        +2.5°C  (high = +80.0°C, hyst = +75.0°C)  sensor = thermistor
cpu0_vid:   +0.000 V

Now, the CPU was not exactly cold, but she was playing WoW for about an hour at the time. What I don't know what to read into though is those ALARM thingies. Does anyone know how much I should be worried about them?

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#2 2010-11-21 07:18:04

Allan
Pacman
From: Brisbane, AU
Registered: 2007-06-09
Posts: 11,365
Website

Re: PC dying suddenly

Does not look too hot...  could be a faulty PSU?

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#3 2010-11-21 07:27:51

lagagnon
Member
From: an Island in the Pacific...
Registered: 2009-12-10
Posts: 1,087
Website

Re: PC dying suddenly

64deg C is getting relatively warm, still within boundaries, but if your CPU heat sink and CPU fan are working properly they should be keeping the temp below 60 and even preferably below 50degC. Most systems though, will not shut down until the CPU gets hotter than 70degC. Reboot your machine, get into the BIOS and check the CPU shutdown temperature settings there. Perhaps it is set for 65deg?

Still, if it were my machine I would be checking the heat sink, fans and CPU die to heat sink thermal compound as I would not like such high temps myself for extended periods of time.


Philosophy is looking for a black cat in a dark room. Metaphysics is looking for a black cat in a dark room that isn't there. Religion is looking for a black cat in a dark room that isn't there and shouting "I found it!". Science is looking for a black cat in a dark room with a flashlight.

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#4 2010-11-21 09:05:37

CountDuckula
Member
Registered: 2010-02-28
Posts: 151

Re: PC dying suddenly

As per what Lagagnon said but look at your BIOS CPU fan speed settings too, as most modern BIOS's have 3 settings for CPU fan speed,

Silent - low speed fan setting
Normal - adjusts fan speed with CPU load
Performance - full out fan speed for max cooling

Make sure CPU heatsink fins are not covered in dust - if they are give it a good blow out.

Ambient room temp plays its part too - warm room = warm PC

Consider bigger heatsink/fan combo for increased cooling. I got myself a Corsair water cooler and it lowered my CPU temps by over 20C

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#5 2010-11-21 12:38:57

thom_raindog
Member
Registered: 2008-04-29
Posts: 175

Re: PC dying suddenly

Thanks for the answers, folks. But as I wrote, the PC does not shut down, it just turns off, like someone flipped a switch or the breaker blew. In my - limited, yes - experience, that is not normal, even for a hot CPU, right?

In any case, I cleaned the thing out inside (amazing how much fuss and dust the average PC collects while running) and right now, after admitedly only 10 minutes of running, no WoW, the CPUs are at 24 and 30 degrees.

Those alarms above still popp up in sensors, that is what I am a bit confused / worried about. Any input on those?

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#6 2010-11-21 12:56:32

thom_raindog
Member
Registered: 2008-04-29
Posts: 175

Re: PC dying suddenly

Quick update:

sensors                                                                                                                     
k8temp-pci-00c3                                                                                                                                       
Adapter: PCI adapter                                                                                                                                  
Core0 Temp:  +39.0°C                                                                                                                                  
Core1 Temp:  +43.0°C                                                                                                                                  
                                                                                                                                                      
w83627dhg-isa-0a10                                                                                                                                    
Adapter: ISA adapter                                                                                                                                  
Vcore:       +1.09 V  (min =  +0.00 V, max =  +1.74 V)                                                                                                
in1:         +0.75 V  (min =  +1.86 V, max =  +0.58 V)   ALARM                                                                                        
AVCC:        +3.31 V  (min =  +2.98 V, max =  +3.63 V)                                                                                                
+3.3V:       +3.31 V  (min =  +2.98 V, max =  +3.63 V)                                                                                                
in4:         +0.96 V  (min =  +1.63 V, max =  +0.53 V)   ALARM                                                                                        
in5:         +0.98 V  (min =  +1.34 V, max =  +0.59 V)   ALARM                                                                                        
in6:         +1.11 V  (min =  +1.49 V, max =  +1.20 V)   ALARM                                                                                        
3VSB:        +3.30 V  (min =  +2.98 V, max =  +3.63 V)                                                                                                
Vbat:        +3.04 V  (min =  +2.70 V, max =  +3.30 V)                                                                                                
fan1:       1394 RPM  (min = 1222 RPM, div = 8)                                                                                                       
fan2:          0 RPM  (min = 10546 RPM, div = 128)  ALARM                                                                                             
fan3:          0 RPM  (min =  703 RPM, div = 128)  ALARM                                                                                              
fan4:          0 RPM  (min = 1054 RPM, div = 128)  ALARM                                                                                              
fan5:          0 RPM  (min = 9375 RPM, div = 16)  ALARM                                                                                               
temp1:       +29.0°C  (high = +85.0°C, hyst = +21.0°C)  sensor = thermistor                                                                           
temp2:       +36.0°C  (high = +65.0°C, hyst = +65.0°C)  sensor = diode                                                                                
temp3:        +4.0°C  (high = +80.0°C, hyst = +75.0°C)  sensor = thermistor                                                                           
cpu0_vid:   +0.000 V                                                                                                                                  
                                                                                                                                                      
[root@black-beauty thom]# uptime                                                                                                                      
 13:52:10 up 20 min,  2 users,  load average: 2.00, 1.63, 1.05   

As you see, the machine has been up for 20 mins and I did nothing but browsing the web. It's a bit hot in there for that, is it? Oh.. fan 2 is not doing anything... I suppose I should check on that.. hold on...

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#7 2010-11-21 13:11:13

thom_raindog
Member
Registered: 2008-04-29
Posts: 175

Re: PC dying suddenly

sensors
k8temp-pci-00c3
Adapter: PCI adapter
Core0 Temp:  +24.0°C                                    
Core1 Temp:  +30.0°C                                    

w83627dhg-isa-0a10
Adapter: ISA adapter
Vcore:       +1.09 V  (min =  +0.00 V, max =  +1.74 V)   
in1:         +0.74 V  (min =  +1.86 V, max =  +0.58 V)   ALARM
AVCC:        +3.31 V  (min =  +2.98 V, max =  +3.63 V)   
+3.3V:       +3.31 V  (min =  +2.98 V, max =  +3.63 V)   
in4:         +0.96 V  (min =  +1.63 V, max =  +0.54 V)   ALARM
in5:         +0.98 V  (min =  +1.34 V, max =  +0.59 V)   ALARM
in6:         +1.11 V  (min =  +1.17 V, max =  +1.71 V)   ALARM
3VSB:        +3.30 V  (min =  +2.98 V, max =  +3.63 V)   
Vbat:        +3.04 V  (min =  +2.70 V, max =  +3.30 V)   
fan1:       1394 RPM  (min = 1222 RPM, div = 8)
fan2:       3515 RPM  (min = 24107 RPM, div = 8)  ALARM
fan3:          0 RPM  (min =  685 RPM, div = 16)  ALARM
fan4:          0 RPM  (min = 1041 RPM, div = 16)  ALARM
fan5:          0 RPM  (min = 8544 RPM, div = 2)  ALARM
temp1:       +34.0°C  (high = +85.0°C, hyst = +21.0°C)  sensor = thermistor
temp2:       +20.0°C  (high = +65.0°C, hyst = +65.0°C)  sensor = diode                                                                                
temp3:        +2.0°C  (high = +80.0°C, hyst = +75.0°C)  sensor = thermistor                                                                           
cpu0_vid:   +0.000 V   

Alright, fan 2 is back in action. Actually all fans were running in the first place, no idea why they did not show...

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#8 2010-11-21 16:21:20

shulamy
Member
From: israel
Registered: 2010-09-11
Posts: 453

Re: PC dying suddenly

it can be a heat of the display adaptor,

but i do'nt remember if this turns off the power

or only stop displaying.

ezik

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#9 2010-11-21 17:58:27

thestinger
Package Maintainer (PM)
From: Toronto, Canada
Registered: 2010-01-23
Posts: 478

Re: PC dying suddenly

shulamy wrote:

it can be a heat of the display adaptor,

but i do'nt remember if this turns off the power

or only stop displaying.

ezik

I had an old 7900GTX, and I broke a crappy plastic pushpin on a heatsink when I moved it to a new computer to use it for a third monitor. The computer would suddenly shut off under certain loads (displaying a lot of stuff on the 3rd monitor...). Eventually, I took everything apart, and found the heatsink hanging off the 2nd video card.

Also, if it is the GPU, I don't think a "clean" emergency shutoff can happen. The PSU just decides to cut power because otherwise it would light on fire due to the power draw.

Could also just be the PSU...

Last edited by thestinger (2010-11-21 18:03:06)

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#10 2010-11-21 19:55:22

CountDuckula
Member
Registered: 2010-02-28
Posts: 151

Re: PC dying suddenly

thom_raindog wrote:

Thanks for the answers, folks. But as I wrote, the PC does not shut down, it just turns off, like someone flipped a switch or the breaker blew. In my - limited, yes - experience, that is not normal, even for a hot CPU, right?

In any case, I cleaned the thing out inside (amazing how much fuss and dust the average PC collects while running) and right now, after admitedly only 10 minutes of running, no WoW, the CPUs are at 24 and 30 degrees.

Those alarms above still popp up in sensors, that is what I am a bit confused / worried about. Any input on those?

In that case you may want to look at getting a good quality (higher wattage) rated power supply as that sounds as if your current PSU is failing under load too.

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#11 2010-11-21 20:25:23

ewaller
Administrator
From: Pasadena, CA
Registered: 2009-07-13
Posts: 19,740

Re: PC dying suddenly

Just out of curiosity, Is this machine running the new 2.6.36 Kernel?


Nothing is too wonderful to be true, if it be consistent with the laws of nature -- Michael Faraday
Sometimes it is the people no one can imagine anything of who do the things no one can imagine. -- Alan Turing
---
How to Ask Questions the Smart Way

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#12 2010-11-24 07:23:53

thom_raindog
Member
Registered: 2008-04-29
Posts: 175

Re: PC dying suddenly

Nope. It's a 64bit and runs 2.6.35

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