CPU overheats and computer crash

Amd athlon / 2000+ thoroughbred
February 15, 2010 at 00:32:23
Specs: Windows XP
I have an older computer I thought I'd try to upgrade a bit. It has a Chaintech 7NIF2 mobo and new fans including a Arctic Cooling Copper Silent 3 CPU heatsink and a new HDD. I overclocked, using the presets given by the mobo bios. It ran a little hot for a while, but nothing major (I monitored with Speedcheck). Gradually over the last few weeks, however, the computer has been crashing, now after only a few minutes. I reversed the overclocking, but no improvement --it shows over 70 degrees in the bios at startup. Is it a matter of just cleaning off the cooler, re-applying paste and reinstalling it, or is my cpu or possibly the mobo irreparably damaged?

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February 15, 2010 at 02:23:52
make sure there is not dust around Cpu chip in tower and clean and reapply heatsink grease besure to clean older grease off heatsibk first and then check for dust build up on video card or anywhere else in case give case a real good blowing out do not use vacumm use canned air


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February 15, 2010 at 06:59:37
When overclocking, do it manually, do NOT use presets! You have to lock the AGP at 66MHz, disable ALL Spread Spectrum options, lower your RAM speed to 133MHz (DDR266) to match the CPU, set the RAM timings to 2.5-3-3-11, then slowly begin to raise the CPU frequency. The CPU:RAM ratio must remain at 1:1, so if the CPU freq is at say, 140MHz, the RAM freq should be at 140MHz. If you run the CPU & RAM out of sync, you will lose performance. If all you have is DDR266, probably the best you're gonna do is about 145-150MHz. Those old T-breds weren't great overclockers anyway. If it's running hot, it's because you mounted the heatsink incorrectly. Follow these instructions exactly, regardless of the brand of paste you use:


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February 15, 2010 at 08:24:26
It sounds like the bottom of the heat sink is not flat on the cpu.

It can be very difficult to see whether the heat sink is flat on the cpu when you do that when you have the mboard in the case - you can only tell for sure by using a small mirror and good lighting.

"Product: Amd athlon / 2000+ thoroughbred"

The proper heat sink for your cpu has a notch on the bottom that must be above the raised side of the socket A socket - there is only one way it can be properly oriented.

This is unlikely, but it CAN be, especially for an older mboard like yours......
E.g. This can cause all sorts of problems, including black screening and re-booting for no apparent reason.

examine the mboard to see if you have bad capacitors, and/or other findable signs of mboard damage .

This was the original bad capacitor problem - has some example pictures.
History of why the exploding capacitors and which mboard makers were affected:

What to look for, mboard symptoms, example pictures:
Home page that site
- what the problem is caused by
- he says there are STILL bad capacitors on more recent mboards.

Pictures of blown capacitors, other components, power supplies, Athlon cpu's, etc.:

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February 16, 2010 at 05:06:32
Wow! Thanks for the quick response. Looks like I have my work cut out for me. I'll start with reinstalling the heatsink, restore the bios to default for now and go on from there. I'll let you know!

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