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CPU Heat sink wrong temperature?

Last response: in CPUs
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July 10, 2014 10:10:33 PM

Hi everyone, I recently just built a computer (just 2 days ago) and everything runs fine except for my CPU TEMPERATURE!

FX-8320
Gigabyte-990fxa-ud3

Here's what has happened:
I first used the stock CPU cooler (because I couldn't get my old CPU off of the after market heatsink). It worked fine! except I wanted to use the after market cooling (its still a crappy one) Arctic Cooling Alpine 64 pro. So I eventually got the CPU off of the heatsink and I swapped the stock heatsink with the Alpine. After turning on the PC, I checked my HWMonitor, it reads the initial temperature as 79 Degrees Celcius.
The temperature goes like: 79, 78,76,73, 70, 76, 74, 71, 68, 71 So it goes down and up but goes down in the long run. In my head, I was thinking, I just turned on the computer, it took 30 seconds to boot, theres no way it starts off at 79 degrees. So I went to bios to see the temperature, (after the CPU cooled down) it starts at 66 degrees and moves up to 79 degrees in about a minute, and it stays there.

I've touched the heatsink to see if the temperature is really true, at 79 degrees my finger shouldn't be able to hold onto the heatsink for a long time. I was able to put my finger on it, and hold it there without any issues.

It felt like 40 degrees to me when I did that. So I'm wondering what's causing the wrong temperature read?
- I've replugged the heatsink and the thermal paste is newly stuck on there (pea sized).

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a b à CPUs
July 10, 2014 10:20:41 PM

Thats because you are putting a cpu cooler on that has no chance of cooling it put the stock one back on
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a b à CPUs
July 10, 2014 10:23:02 PM

The Arctic Cooling Alpine 64 Pro is just such heatsink: ideal for mainstream CPUs that don't exceed 90W TDP
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July 10, 2014 10:41:55 PM

THANKS!
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July 10, 2014 10:56:24 PM

coolcole01 said:
Thats because you are putting a cpu cooler on that has no chance of cooling it put the stock one back on


Hey I just plugged in the stock cpu, the temperature did change to 40 degrees celcius now, but it stills goes like:

43,42,39,37, then jumps back to 43. Is that normal? I doubt it?
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a b à CPUs
July 10, 2014 11:03:44 PM

yep completely normal what your seeing is the sensor reporting every couple seconds and temps do flutuate
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July 14, 2014 3:09:48 AM

coolcole01 said:
yep completely normal what your seeing is the sensor reporting every couple seconds and temps do flutuate


Not 100% sure if it's normal, I hear the fan change speed dramatically every 3 seconds because of the temperature going from 38 down to 28 and repeat every 3 seconds (takes 3 seconds for the temperature change) Theres like almost no way the temperature changes so fast every 3 seconds from just browsing websites?
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a b à CPUs
July 14, 2014 8:03:20 AM

If it was jumping 10-20 degrees I would be worried but I'm pretty sure your cool. If your looking for a great cooler the 212 evo is the one to get.
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a b à CPUs
July 14, 2014 8:07:10 AM

Just Google videos of people using hwmonitor and you will see all of them jumping the cooling system on a cpu is not like a car it doesn't have this advanced type of cooling so it's reactive gets hot fan goes up cools fan down it is never really steady.
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