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Random Crashes and Shutdowns

I'm having a strange problem with my PC. I can't remember when it started but I've had this for about 18 months now.
Randomly, and belive me it's random. My PC reboots or shuts down completely. I've watched this happen through a remote
program and the last screen I always see is my ASAU PC Probe open with the CPU temperature 79 degrees celcius. I've also
watched this in front of the computer. For whatever reason my CPU temp suddenly goes rising at an extraordinary rate. I've
check Task Manager and such while it's doing this and there are no programs taking any serious memory, IO or CPU, in fact
there is absolutely nothing going on in the PC. Room temperature is on normal days 21-24 degrees celcius and I have a water
coolant system which is cooled by a set of 3 fans blowing in and out of the box. My PC normally runs at 43 degrees celcius.

Specs :

AMD 2500XP
1 Gbit 333MHz Memory
ASUS Mobo (With latest Bios)
2x120Gbit HD (Plenty of room on both disks)
ATI 9800 Pro 128MB (Hercules) (Latest ATI drver)
SB Audigy (Latest Driver)
Plextor 48/24/48A (Latest Bios)
Windows XP Pro (Fully patched)
3Com 10/100MB Ethernet card (Latest Driver)
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gudmo
Asked:
gudmo
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1 Solution
 
LucFCommented:
Hi gudmo,

> and I have a water
> coolant system which is cooled by a set of 3 fans blowing in and out of the box.
Check for leaks, check the pump, check the attachment of the heatsink on the processor (make sure there is a tiny layer of thermal greese in between)

Greetings,

LucF
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gudmoAuthor Commented:
This was one of the first things I did
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LucFCommented:
I understand that, but it has to be a cooling problem.
Check if there's no problem with the water flow. What you might want to try is to put the original fan-based cooler back on the processor. Also, you might want to check the core voltage, if you didn't by accident set it too high.
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shaggybCommented:
well it sounds to me like an intermitent problem those athlons run REAL hot and will cook themselfs to a crisp in a hurry.....

if everything is working fine and then just out of the blue you get high cpu temp then that signifys that your cpu is no longer having the heat removed from it....duh ok with the obvious out of the way then if you have no leaks then it would leave either the pump... or the fans or a clog... do you have anything growing in your waterpump?   perhaps a blockage at times prevents the water from making it to the cpu......       i think you can also rule out leaks in this case becuase 1 your mobo would be toast and 2 you would have the problems as soon as you booted again if you had not refilled the levels of water........   so my vote is etiher the fans the pump or clogs........ try cleaning out your colling system..................... also pay attn to the sounds your box is making when this happens again    listen for the sound of fans (or lack there of)
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gudmoAuthor Commented:
No blockage no, I've monitored the water throughbut and water heat and that is running nicely even though the CPU is spiking like this. The coolant system is as clean as a whistle and it has been well taken care of.

What I should try is to place a compliant fan there, but I don't have one since I bought the system in parts here and there and there was no "original" fan that came with the package.
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shaggybCommented:
check your local computer retailer best byu compusa etc   they sell cpu fans you could find one for like 20$


just make sure its athlon aproved
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gudmoAuthor Commented:
The lowest I can get for a decent fan in Iceland is 40$ so I may try to scrounge something up.
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shaggybCommented:
oh...heh yea forgot the internet is world wide........
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jarichCommented:
gudmo,
Overclocking can cause this sort of problem. An 2500XP should not need water cooling as it should work fine with a regular air cooled heat sink, as long as it is not overclocked. Just make sure you are getting enough air through the case.
Good Luck,
Jerry
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RWrigleyCommented:
Check your powersupply.
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ico2Commented:
try using a different monitoring program. the one you are using could be getting confused, producing temperatures that are higher than the actual temperature and automatically shutting down.
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tpilgCommented:
to carry on from ico2, the temperature monitoring programme I have reports the temperature of the CPU, the temperature of the motherboard and the temperature of the had disk. However although the numbers match those that the BIOS monitor gives, it gets the labels wrong. Thus when the monitor progie tells me motherboard is 45 degrees it is actually the CPU that is 45 etc. Its not the motherboard spiking if the GPU is getting hot and the fans can's cope.
 
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OpinerCommented:
Check the voltage for the processor and make sure it is within the recommended range.
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gudmoAuthor Commented:
Okay, Last monday I purchased a ThermalTake CPU fan and replaced my water cooling system. The system has been running fine since.

I've also relized what was wrong..

 The water coolant system fans were connected to two power outlets on the MB, however neither of those two power outlets was
specifically marked as a CPU fan power outlet, into which my FAN is currently connected. This was so because the power line didn't
reach the CPU fan power connector.

The MB I have increases voltage to the CPU Fan outlet if the CPU heats up, this is so the fan runs faster to cope with the increase
in heat. This is the only power outlet which is autamatically controlled like this and as it was whenever the CPU got hot due to some-
thing or anything the water coolant didn't pump any faster and the CPU heat spiralled out of control shutting the computer down.

I want to thank everyone who contributed to this problem, from now on I'll stick with the CPU fan power outlet.
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jarichCommented:
gudmo,
The purpose of a voltage control on the cpu fan is to make the fan make less noise when the cpu is reporting lower temps. The tempature control can not raise the voltage over what a noncontrolled connecter on the mother board would put out in voltage. More and more mother boards need to have the cpu fan connected to the cpu connector on the mother board, less they will shutdown thinking there is a heat problem. Glad your heat problem is cured. If an expert helped you solve this problem, I hope you can award them the points.
Thanks,
Jerry
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Computer101Commented:
PAQed, with points refunded (125)

Computer101
E-E Admin
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