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Intresting is my thermal sensor dead?

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jcraw07

Member
Joined
Jan 20, 2010
Its odd really. I watch my temps as they flux around and well the top two do not move from 40c unless I really get stuff rolling.
Notice how the top two didn't move after the testing was complete. The second core hardly moved at all 43c? the 1st one finally went too 49. I used prime 95 for ten minutes using four threads.
Untitled-2.png
After I installed the motherboard fan it hit 17c :)
Untitled-3.png
 

burebista

Member
Joined
Mar 13, 2006
Location
Romania
Take latest RealTemp beta and do a CPU Cool Down Test and post a screenshot here.
It looks like Core0 and Core1 are stuck at 40C. Nothing to worry, it's benign and it's common for 45nm CPU's because Intel go cheap on their sensors and they're not calibrated for accurate temps but for triggering thermal throttle/shutdown when they're close/beyond to TJMax value (whatever it is that value).
 

burebista

Member
Joined
Mar 13, 2006
Location
Romania
Yep, press Sensor test and in the next window press Start and choose your prime95 path. :)
Take a 10 minutes coffee break and post a screenshot with test completed.

cool_down.png
 

burebista

Member
Joined
Mar 13, 2006
Location
Romania
Yep, two stuck sensors (Core0 is moving at ~50% load and Core1 at ~95% load), and two wacky sensors (Core2 at 18C and Core3 at 20C).
What's your ambient temperature and what cooling do you have on CPU?
Anyway idle temps mean nothing so if you want to test your sensors in full-load try to OC your CPU and heat up with LinX.
But TBH you're perfect fine now. You have a usual Intel 45nm CPU. :)
 

Bobnova

Senior Member
Joined
May 10, 2009
Like the others said, it isn't an issue at all.
Intel built them to be extremely accurate at 100*c and in that general area, at the expense of accuracy at lower temps. As a result they are very, very accurate at 100*c, and of dubious accuracy at best below 50*c.
Considering that 40*c isn't even close to being near a temp that could possibly cause issues, those stuck sensors are just annoying, not a problem.

The #3/#4 sensors are likely reading low, though if you're in a cold room and have speedstep/C1E enabled they might be accurate.
 

Bobnova

Senior Member
Joined
May 10, 2009
Nope. Not really.

68*f is 20*c, so anything lower then that is clearly out to lunch.
If you have a good cooler and are at stock volts with speedstep/C1E enabled i could believe 23-25*c idle temps.
 
OP
jcraw07

jcraw07

Member
Joined
Jan 20, 2010
Yea I have a nice setup.

80mm: http://www.newegg.com/Product/Product.aspx?Item=N82E16835705037
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120mm non stock:
http://www.newegg.com/Product/Product.aspx?Item=N82E16811999029
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Case: http://www.newegg.com/Product/Product.aspx?Item=N82E16811119137
--------------------------------------------------------------------------
Heat sink: http://www.newegg.com/Product/Product.aspx?Item=N82E16835118003
--------------------------------------------------------------------------
PCI: http://www.xoxide.com/thermaltake-slot-cooler-uvblue.html


design.png
 
Last edited:
OP
jcraw07

jcraw07

Member
Joined
Jan 20, 2010
update,

going to buy a thermo gun. but here are some results for a 10 min test.

before.png
After.png