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CPU Overheating no solution yet.

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Unread 04-04-2015, 06:18 AM   #1
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CPU Overheating no solution yet.

Hi, my first post in the forum. It's good to meet all of you.

I have an old Sager gaming laptop that has been going strong for 6+ years, I've upgraded, but my wife has been using it and loves it.

Anyway it has a Intel Core Duo t5800 processor, and geforce 9800 gt GPU if I remember correctly. It recently started getting sluggish and overheating. So I did all the normal things.

1. Opened up the base and cleaned the fan and heat-sink fins. I do this fairly regularly and they were not bad. It did not help.
2. So I popped the hink-sink off the cpu and cleaned old thermal paste off and put new Artic Silver on it. It did not help
3. So I thought that perhaps the fan was a little old and perhaps weak so I ordered a new one, and put it on there. Still running hot.
4. So I thought maybe the cpu itself was going, thermal sensors or something. The t5800's are really cheep on Ebay so I simply ordered one, and popped it in. Still exactly the same heat readings.
5. So I decided to undervolt it as much as possible. That helped, a little. But still under just moderate use the temperature builds and eventually hits t max, and the cpu begins to throttle to 100%.

Also It does not seem to be a Windows problem, because I also booted linux and ran some cpu testing programs and monitored the temps and they still went hi.

So I am thinking the motherboard is the problem, and if that is the case we are going to have to retire the thing, but well its an old friend and has been with us longer than our children, so it is hard to let it go.

Any ideas what I might be overlooking?

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Unread 04-04-2015, 08:52 PM   #2
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Re: CPU Overheating no solution yet.

Are the CPU and GPU on the same heatpipe/sink?

If not then it does sound like it's the motherboard I'm afraid.
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Unread 04-04-2015, 08:53 PM   #3
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Re: CPU Overheating no solution yet.

Also check the connection between the pipes and the fins; if anything is loose that might be it.
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Unread 04-04-2015, 11:05 PM   #4
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Re: CPU Overheating no solution yet.

The heat pipes are separate, and the GPU temps are just fine. Also nothing seems to be loose on the pipes and fins, so it is looking bleak.

What would the motherboard be doing that would cause the overheating? I have watched the voltages (if they are being reported correctly) and they seem fine, and it does not seem to be overclocking the processor or anything.
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Unread 06-04-2015, 08:51 AM   #5
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Re: CPU Overheating no solution yet.

If you have a special experience you can sell it here I was too lazy to read the Forum Rules before posting.

Last edited by habibjp; 06-04-2015 at 11:36 AM..
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Unread 06-04-2015, 11:45 AM   #6
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Re: CPU Overheating no solution yet.

I suspect something is wrong either with the chipset (NB+SB) or VRMs but tbh that's based on my experience with desktops, I'm not sure how laptop motherboards differ.

It might be worth having a look on the manufacturer's website to see if you can get a BIOS update, not sure if it would change anything but you might find more options/features in a newer BIOS revision.
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Unread 06-04-2015, 11:48 AM   #7
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Re: CPU Overheating no solution yet.

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Just had a thought - have you or your wife been using it with the battery in? In my experience (older) laptops always run cooler with the battery removed (typing this on a 7yo Dell, battery gave up the ghost a couple of years ago)

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