CPU temperature of 85C

June 12, 2011 at 07:26:27
Specs: Windows XP, AMD Athlon 3500+ / 528 Mb
Hello!

I have an AMD Athlon 3500+ CPU with infinity motherboard and a 3000 RPM with heatsink cooler.

My problem is that the CPU is overheating and whet it reaches 85C the pc shuts down. I've clean the hole pc including the heatsink and replaced the thermal paste 4 times and the CPU is still overheating. The thermal paste I've used is "Cooler Master". I know that the thermal paste I've used is not that good like Arctic Silver but still the CPU shouldn't reach 85C .

This problem appeared before but after a while it disappeared all by it's self .

What do you think is the problem and please before suggesting that I buy a new cooler or thermal paste consider that the when the CPU is at 85C the heatsink is cool (30C) and the problem might be the thermal sensor on the motherboard?


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#1
June 12, 2011 at 08:04:07
Thermal paste is thermal paste. Personally, I use the cheap silicone based stuff from Radio Shack for about $3. Been using it for over 10 years. It all works about the same no matter which brand you use. What's important is how it's applied. All AMD CPUs use the "center dot" method. If you layered the paste on like frosting on a cake, that's the problem. Remove the heatsink again. Clean ALL traces of paste from both the top of the CPU & bottom of the heatsink. Put a tiny dab of paste about the size of a grain of rice in the very center of the CPU & do NOT spread it around. Set the heatsink in place on top of the CPU & lock it down. Once locked in place, give the heatsink a gentle twist back & forth to help seat it. That's all there is to it.

Here's an excellent youtube video that shows the different types of thermal paste applications & how they work:

http://www.youtube.com/watch?v=EyXL...


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#2
June 12, 2011 at 08:14:37
If you read my post carefully you will notice that I've said that I replaced the thermal paste four times. I've tried all the methods spreading it , a line in the center , a dot (the size of a rice) in the center and before each application I've clean the CPU and heatsink.

The PC had done this in the past and after I did not use him for 30-40 days the problem disappeared.


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#3
June 12, 2011 at 08:21:43
I did read your post. You said '4 times' but didn't state which method(s) you used. Arctic Silver is no better or no worse than Radio Shack, Cooler Master, or any other brand out there. It's all in the application. There is only ONE acceptable method for AMD CPUs - that's the center dot.

Watch the video.


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Related Solutions

#4
June 12, 2011 at 08:41:56
I've tried the center dot method two times and both times the results where the same. (76C with 10 of CPU)

I would like to know if this is a temperature sensor problem !! How do I check to see if the temperature sensor works correctly ?


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#5
June 12, 2011 at 08:44:00
I've tried the center dot method two times and both times the results where the same (76C with 0-10% of CPU and 85C when CPU exceeds 30-40% ).

I would like to know if this is a temperature sensor problem !! How do I check to see if the temperature sensor works correctly ?


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#6
June 13, 2011 at 00:13:21
http://www.hwinfo.com

HWINFO32 has a temperature monitor, and seems aok..


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#7
June 13, 2011 at 06:59:29
Are you sure you are installing the heat sink correctly?

So the heat sink/fan is not a retail unit but an aftermarket? Did you verify it is rated for the processor you have?

When you remove the heat sink can you see any visible ridge of thermal compound anywhere?


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