CPUs running warm on one motherboard

[Widjaja]

I have tried two different CPUs on my current motherboard and both of them are running at the same temps regardless of what I do.

I have run a X2 4800+ and Opty 180 so both are technically the same in specs.
And both of them idle about 40degC pretty easily and this is under a Tuniq Tower.
Not using Cn'Q running stock volts.
At first I thought it was the X2 4800+ just getting old or because it never used to run this hot but when I installed the Opty 180 I found it was getting identical temps.

Is it possible the socket on the motherboard itself is causing the CPU to heat up more than usual?

If so I have never heard of a socket having heat problems.

 

[erocker]

The CPU temp is taken from the socket. It's pretty certain that the temp sensor for the CPU socket is stuck.

 

[Widjaja]

The CPU temp is taken from the socket. It's pretty certain that the temp sensor for the CPU socket is stuck.

I forgot to mention I am using Core temp to read the temps.
And Core temp reads from the CPU die?

 

[OneMoar]

ignore it

 

[Widjaja]

ignore it

Is this the kind of advice you give people when there maybe a heat issue :shadedshu

 

[MikeX]

Don't trust your mobo, get an external measurement instrument.
A quick google: Scythe TM02-BK Kama Thermo 02

 

[Widjaja]

I have always wanted to get a digital thermometer.

I don't trust my mobo either.
I believed Core temp showed the reading off the die on the CPU but my cooler does not seem to be all that hot.

I have another motherboard which I could test the CPUs out on, it's just a hassle but I may have to do it just to see if it truly is my motherboard causing these readings.

 

[OneMoar]

Is this the kind of advice you give people when there maybe a heat issue :shadedshu

first of all that's not the kind of response you give when someone takes time to respond you
secondly 40c is fine
f

 

[erocker]

I forgot to mention I am using Core temp to read the temps.
And Core temp reads from the CPU die?

I don't think those CPU's even have core sensors. s939 and earlier only has the CPU temp sensor that is located on the motherboard.

first of all that's not the kind of response you give when someone takes time to respond you
secondly 40c is fine
f

If you can't post something helpful or relevant don't bother. 40c is fine? Sure, if the readings are accurate and it clearly is shown that the temp sensor is stuck at 40c so the number is irrelevant.

 

[Velvet Wafer]

I don't think those CPU's even have core sensors. s939 and earlier only has the CPU temp sensor that is located on the motherboard.

my 939 X2 3800+ has a socket sensor, and two separate core sensors... which both react independently.

 

[Widjaja]

my 939 X2 3800+ has a socket sensor, and two separate core sensors... which both react independently.

This is the impression I was under all this time too.
But then finding out both CPUs are getting the same readings made me question whether the readings are incorrect or the motherboard was causing the cores to run hotter than usual.

 

[erocker]

my 939 X2 3800+ has a socket sensor, and two separate core sensors... which both react independently.

Your 3800+ has two core sensors. The socket sensor is in the motherboard.

 

[Velvet Wafer]

This is the impression I was under all this time too.
But then finding out both CPUs are getting the same readings made me question whether the readings are incorrect or the motherboard was causing the cores to run hotter than usual.

do the readings change, ever? if they do not, its as erocker said, and your boards temp sensor got stuck... you can buy a sensor with a small,lit LCD display pretty cheap, that fits under the proc, and will do about the same

Your 3800+ has two core sensors. The socket sensor is in the motherboard.

Indeed,that is absolutely correct.. i just have stated that the wrong way...

 

[Widjaja]

I am confused right now.

So core temp is not reading no directly from the CPU die itself but from a motherboard sensor which is reading the cores but could be giving a false reading?

As for your question Velvet Wafer.
The temperature reading does change underload.
It will hover just below 40degC then jump up to 57degC + underload with both CPUs reading from coretemp.

 

[Zyon]

Try reapplying thermal paste?

 

[Widjaja]

Try reapplying thermal paste?

I've covered that one.
Clean with iso, Re apply AS5 and reseat with both CPUs.
Same results.

 

[Zyon]

Hmm, does it feel warm when you touch it though?

 

[Widjaja]

Hmm, does it feel warm when you touch it though?

Haven't tried touching the CPU cooler copper block.
Don't think I'll be able to physically get there.
I'll be able to get to the copper pipes but that about it.

 

[OneMoar]

derp
its not feeding it the 1.42v instead of the nominal 1.32-1.36 is it ?
some motherboards feed the amd chips wayy to much voltage by default
sry about the earlier posts wayy to sleepy -.-

 

[Jstn7477]

Older AMD/Intel lidded CPUs use thermal paste between the lid and the die, so as the CPUs get older the paste dries up. Newer lidded CPUs use solder between the die and the IHS.

 

[Zyon]

I mean, touch the CPU and see if it feels somewhat warm enough to be as the temperature indicated.

 

[Widjaja]

derp
its not feeding it the 1.42v instead of the nominal 1.32-1.36 is it ?
some motherboards feed the amd chips wayy to much voltage by default
sry about the earlier posts wayy to sleepy -.-

I have been wondering if my motherboard had been over volting the CPUs but CPUZ indicates it fluctuates between 1.35v-1.40v
I have seen an instance of an AM2 chip being overvolted by default on an ASUS board.

Older AMD/Intel lidded CPUs use thermal paste between the lid and the die, so as the CPUs get older the paste dries up. Newer lidded CPUs use solder between the die and the IHS.

Yeah I have delidded AMD CPUs.
I de-lidded my X2 4800+ ran it naked and the results weren't any better so I just reattached the IHS with non acid sealant with AS5 inbetween, still no difference.
No gains no decrease.

I mean, touch the CPU and see if it feels somewhat warm enough to be as the temperature indicated.

How do I touch the CPU to see if it is running hot when it is under a heatsink?

 

[OneMoar]

set the voltage to -0.025 - 0.0.30 see it if makes a difference if you have a decent chip it should not need more then 1.36v at stock speeds
and never never never never run a chip without the IHS its there for a reason
its there do make sure the cores are evenly heated and its there to protect the die from the weight of the cooler ( remember the days of destroying socket A Athlon's due to cracking the die or cracking the edge )
and artic silver 5 while still ok its not the greatest thing to use
get some mx3 or mx4

 

[Widjaja]

I'll drop the voltage and see if it does anything.

AS5 would have been a lot better than the bog standard thermal paste which was applied.
Sure the MX pastes would have been more conductive but didn't have any on me at the time.

People have de-lidded and ran CPUs naked before by adding shims which is what I did.
You just have to be careful if you are certain you are going to run your CPU naked.

 

[Velvet Wafer]

I'll drop the voltage and see if it does anything.

AS5 would have been a lot better than the bog standard thermal paste which was applied.
Sure the MX pastes would have been more conductive but didn't have any on me at the time.

People have de-lidded and ran CPUs naked before by adding shims which is what I did.
You just have to be careful if you are certain you are going to run your CPU naked.

I have done that too, with my 3800+...its under water, and runs 30 idle and about 40 under linx load