P4 overheating; tried obvious

Intel Intel p4 w/ ht technology - 3.2ghz...
July 27, 2010 at 08:01:19
Specs: XP SP3 / Ubuntu 10.04
Could it be CPU, MB or PSU? How to fix? Can I replace one P4 with another scavenged one? Any advice greatly appreciated :) I've tried Google, but haven't found much.

My 3.2GHz P4 (not OC AFAIK) is reaching 92°C within a minute or two of starting up (in BIOS setup's temperature/voltage monitor), before turning itself off. Either that, or the temperature sensor is faulty.

I've tried cleaning dust from the heatsink, and then tried cleaning and reapplying the thermal paste between the heatsink and the CPU. The voltages are all apparently more or less as they should be.

Plz advice:
I have another P4 from another dead computer. It has a different spec., but I think the socket is the same. Can I use it as a replacement? Is it just a case of plugging it in (w/ heatsink, fan)?

It started cutting out during heavy processing, got more and more frequent, faint beeping sounds coming from somewhere (not the fan).

Thanks for your input.

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July 27, 2010 at 08:09:15
"is reaching 92°C "

That's kinda high for a P4. Given the age of your computer I am guessing your Thermal Greece on the Heat Sink has dryed out. Try putting on new slathering.

"the thermal paste between the heatsink and the CPU."

Oops never mind. Then the problem is probably your cooling Fan is not spinning at the same speed it use to. You should be able to find replacement fans at a Computer store or electronics shop. Just bring in your old fan so they can match the form factor.

You could try the fan from your other computer but I like to go new with Fans because they have bearings and brushes that wear out.

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July 27, 2010 at 08:13:54
Edit: sorry, it only showed the first bit of your post. Any idea what a normal CPU fan speed is? Mine's going at 2500 rpm. I wouldn't like to replace it unnecessarily.

Perhaps I should have been clearer. I bought some new thermal compound, with which I replaced the existing, "dryed out Greece". No effect.

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July 27, 2010 at 09:20:38
either u didn't apply thermal paste correct or cpu cooler isn't seated properly.
List the system specs.

edit: here is the instructions http://www.arcticsilver.mobi/sngl_c...

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Related Solutions

July 27, 2010 at 14:15:07
It is extremely important that the paste is applied correctly..."slathering" is not a term that should be used. The paste should NOT be spread around like you're frosting a cake, all you need is a very small amount.

The top of the CPU must be completely cleaned of ALL traces of the old thermal material. The same goes for the bottom of the heatsink. The bottom of the heatsink should then be "tinted" & a tiny dab of paste about the size of a grain of rice should be applied to the center of the CPU. The heatsink should then be locked in place. That's all there is to it. This is called the"middle dot" method. If you did it differently, you did it wrong.

Intel Middle Dot method

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July 28, 2010 at 08:17:38
Thanks for your advice so far.

I wonder what could have caused the original overheating problem (before I tried re-pasting), and why it worsened so quickly?

I did read up on how to correctly apply the paste before doing so, but I'll do it again, just in case.

It would be fantastic if someone could spare the time to answer the questions in my OP, if only to indulge my curiosity.

Thanks again!

kuwese: which system specs?

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January 4, 2011 at 00:26:37
I had the same problem with my P4. It was overheating and was reaching core processor temps of 110C and would cause a system thermal shutdown. I replaced the thermal grease with Artic Silver 5, considered to be a far superior paste than the stock Intel provides, and was still reaching start up temps of 100C and within minutes would shutdown. Played around with the case fans, which are adequate in numbers, 5 in total, and tried different inflow outflow combinations and nothing worked.

Then I saw the top of the fan heatsink as it was spinning and saw a thick layer of dust. Dust acts as an insulator and prevents the cooling fins from doing it's job. Took my Dyson out, since it has a powerful suction to pull the dust from the deeper parts of the heatskink, and voila, temps immediately dropped down to 51C.

Hope this helps. My only regret, is that now I don't have an excuse to build another system :(.

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January 5, 2011 at 04:54:58
Ah, this thread...

Glad to hear it worked out, LinoMiami.

To answer my own questions, it IS possible to use another CPU as a replacement (provided they have the same socket).

It was the CPU that was damaged.

It turned out that some of the original paste had seeped onto the CPU board. After cleaning that up, it worked for a while, bit it must have been damaged and failed again. I replaced the CPU and miraculously managed not to use tile grout instead of thermal paste or anything and it's been working fine for some months.

Thanks for your help! :D

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