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Old 01-16-2017, 10:55 PM   #1
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Default Weird CPU Temps, help!

A few months ago I got an oldish PC that I wanted the CPU out of, took it and the motherboard out, tested it, worked fine. Had a look at the CPU temps and they would fluctuate quickly from 37-39-40 and would do weird things like that. Try and run a game or anything and temps would go to 78 very quickly. The CPU in question is a Intel I5-2400. I got a new motherboard and a new CPU cooler and still have the same results. Whats going on?!

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Old 01-17-2017, 08:02 AM   #2
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Default Re: Weird CPU Temps, help!

Bad thermal interface will allow rapid fluctuations by not having a high enough effectiive mass.could be to much or too little thermal paste. Could have gaps or too great a distance between the cpu and heatsink.
You are not getting proper conduction or you have a bad cpu core.
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Old 01-17-2017, 09:54 AM   #3
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Default Re: Weird CPU Temps, help!

I agree. I would double check your thermal paste and cooling setup.
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Old 01-17-2017, 04:41 PM   #4
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Default Re: Weird CPU Temps, help!

I have taken the Cooler off 3 times, reapplying the paste using the pea method, but every time I've gotten the same results. Had the same thing happen with the stock cooler
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Old 01-17-2017, 08:28 PM   #5
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Default Re: Weird CPU Temps, help!

What is the paste you're using? And how big a pea size? What you need is a paper thin layer on the contact area.

Instead of using a pea method, spread 'em thin.
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Old 01-18-2017, 12:27 AM   #6
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Default Re: Weird CPU Temps, help!

Either that or your temps are being recorded inaccurately somehow.
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Old 01-18-2017, 02:44 AM   #7
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Default Re: Weird CPU Temps, help!

Using Cooler Master paste, a smallish pea, would be a paper thin covering on the CPU. I was sorta thinking inaccurate readings, but I'm not sure how
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Old 01-18-2017, 05:30 AM   #8
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Default Re: Weird CPU Temps, help!

Download Speccy and run. Look at the temps of each core and report.
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Old 01-18-2017, 05:53 AM   #9
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Default Re: Weird CPU Temps, help!

Core Speed Multiplier Bus Speed Temperature Threads
Core 0 3308.7 MHz x 33.0 100.3 MHz 34 C APIC ID: 0
Core 1 1604.2 MHz x 16.0 100.3 MHz 34 C APIC ID: 2
Core 2 3308.7 MHz x 33.0 100.3 MHz 37 C APIC ID: 4
Core 3 1604.2 MHz x 16.0 100.3 MHz 37 C APIC ID: 6
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Old 01-18-2017, 06:59 AM   #10
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Default Re: Weird CPU Temps, help!

Check it once in a while and you'll probably see there's no cause for alarm.
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