Really high CPU temps.... Or a broken sensor?

[amoo3]

Hello folks!

I recently purchased a new motherboard for my computer and saw a 15*C increase in temperature in my Athlon 3200+ (939). In the old board (An MSI low-end model) the temperatures were at 32-40* Now with the new board they are at 45-55*. I was wondering why the change in mobo would have such an affect on the temperature. Any of you have the answer?

Thanks
-Amir

Okay, so I downloaded Everest Ultimate trail, and it says this:

CPU: 53*
CPU #1: 35*

The software that came with the motherboard, and the BIOS say the higher one.
I used arctic silver 5, and I just bought a Ninja Plus to cool it with a few days ago.

Oh, also its an Athlon 3200+ so it definetly should not be, nor ever was before on the other board, this hot.

I have tried reapplying thermal paste about 3 times with little results. When I use Everest it lists 2 CPU temps. CPU, which is the high one, and CPU #1 which shows temps as the should be, or at lease around there.

I have posted this on 2 other forums also and no one could help me i hope you guys can

 

[Talcite]

I think your first board might actually have a problem. 32-40 is pretty hard to get since it's only a few degrees about ambient. Anyways, there's nothing really wrong with a 50ish cpu temp.

I've heard of problems with mobo temp sensors being miscalibrated when they leave the factory. It's nothing huge to worry about though. You're not getting any crashes are you?

It's also possible when changing mobos, you changed something that altered the airflow in the system.

 

[amoo3]

Well, I know that theres nothing wrong with its temp right now, but i wasnt to OC it, and with a 50* idle temp I don't think its a good idea. thats why i got the scythe, but it doesnt seem to be helping. In all the forums so far no body has adressed the thing where Everest shows 2 CPU temps. What do you think that could be about?

 

[Talcite]

What do you mean by everest displaying 2 cpu temps? well if you want to OC, put in some case fans and check the airflow. panaflo is pretty quiet.

 

[amoo3]

When I go to Everest and click on sensor it says this:

*stuff*

Temperatures
Motherboard: 38*
CPU: 50*
CPU #1: 33*
Aux: 35*
Western Digital: *trial version*

Now, the CPU #1 temp seems right to me, but the software that he manufacturere gave to me, and the BIOS say the CPU temp.

Thanks
-Amir

 

[imported_inspire]

I would think that one of those CPU's is your southbridge.

 

[amoo3]

Oddly enough I don't think I have a southbridge. All I have is one chip with a little hsf on it. I believe that both the north, and southbride have been combined into this one. I have a Jetway 939GT4-SLI-G

 

[Talcite]

I know the CPU has an (perhaps several) internal temperature sensors, and the motherboard also has a cpu temperature sensor. Now I can't remember if the CPU one was accessible though bios or by any software. My memory says no, but I'm not 100% sure. If i'm wrong, then that's probably one of your temperatures.

 

[amoo3]

If they were both actual CPU temps why would they vary so much?

 

[betasub]

The CPU temp of 50 C is the correct one you should be monitoring (CPU internal temp). If you stress the CPU (e.g. Prime95) you'll see this temp climb rapidly. However I wouldn't suggest that just yet because when idling your CPU temp should be only slightly above case/motherboard temp (i.e. 38-40 C based on your temps).

It's most likely that the increase in idle temp you've observed is because the HSF wasn't correctly seated when installed on your new motherboard. You say you've re-applied paste 3 times - I hope you have cleaned off old paste/thermal compound and are only using the tiniest drop of AS. I'd check carefully the seating and retention brackets.

 

[amoo3]

I have done that 4 times now with 2 diffrent HSFs. I don't think that thats the problem.

 

[Talcite]

The reason why they might vary so much is because like I said, the motherboard one might be miscalibrated. There's a reason why when we were all trying to build a cpu simulator at procooling.com, we didn't just use the motherboard sensors =p.

I really don't remember if you could access the internal CPU temps though... Betasub, are you sure those are the cpu readings? I remember us actually grinding into the IHS and putting a thermal probe there.

 

[amoo3]

So what do you suggeset I do?