Temperature of CPU runs higher

TJ
TJ
Joined: 11 Feb 05
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Topic 194795

I noticed that the temperature of the cpu core become hotter the last 2 weeks. Has someone else made the same discoveries. And/or is there something changed in he Einstein code for crunching?

For almost 8 months my i7 runs 6 CPU WU's and one GPU (with some CPU as well). All cpu's (the 7 cores) where running between 60 and 64 degrees Celsius. I was and still am running the Boinc add-on TThrottle to avoid overheating. However since a couple of weeks the temperature runs higher to between 70 en 75 degrees Celsius. The max. core temperature is 67.9 degrees Celsius according to Intel. So I become a bit anxious about the heat. I have cleaned out the case (has 3 fan's) with Dust-off and a vacuum cleaner. But that didn't help, so therefore my question to you all.

Any suggestions?

Greetings from
TJ

archae86
archae86
Joined: 6 Dec 05
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Temperature of CPU runs higher

Quote:
Any suggestions?


Something has changed, but perhaps it is not BOINC or the Einstein aps. If you have not already done so, I suggest you make some checks to see whether something else is using significant time on your host. You have your hosts hidden, so I can't tell, but if they are Windows you can get a quick look with Windows Task Manager, probably by just combining ctrl+alt+delete then selecting the Processes tab and paying attention to the CPU column.

However that is just an instantaneous view. A better view would come by downloading Process Explorer. It was developed independently, then later bought by Microsoft, so it is safe and supported, but quite useful. With it you can see a bit of recent history graphically, and also see cumulative resource consumption by a task since it was launched.

I've had a number of different things suddenly use more CPU than expected on my machines in the past. Just for a few examples:

1. The (London) Times web site at one time had some advertisements on the main page which could put my usually well-behaved Firefox browser in the position of burning up nearly a whole core until I vacated the page.

2. My virus scanner uses quite a bit of CPU during some phases of a system scan.

3. I've had more than one application just lock up in a state in which it chewed as much CPU as it could get allocated (generally limited to one core--maybe it is a good thing not many applications are usefully multithreaded yet) until killed.

Oh, yes, another use for Process Explorer is killing an otherwise reluctant application, once you notice it.

I'd not exclude the possibility that your problem is more narrowly BOINC-related, but given your presenting symptoms and assessment so far, it seems less likely than something else.

TJ
TJ
Joined: 11 Feb 05
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Credit: 21,041,858
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Thanks for your input

Message 97179 in response to message 97178

Thanks for your input archae86.
The task manager is running all the time, but it is not shown any changes or odd things. I have run Process Explorer, and gave the same result. 6 Einstein apps running and 1 milky way cuda app. And some other programs as IE and TThrottle. Not using a lot of cpu and memory.
If I suspend Boinc, the temperature drops rapidly. Without Tthrottle cpu temperature rises to 70°C+ after a few seconds.

I also noticed that some einstein WU's run very long comparing to others, variation off 7-12 hours to complete.

Greetings from
TJ

Snow Crash
Snow Crash
Joined: 24 Dec 09
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RE: If I suspend Boinc, the

Message 97180 in response to message 97179

Quote:

If I suspend Boinc, the temperature drops rapidly. Without Tthrottle cpu temperature rises to 70°C+ after a few seconds.

I also noticed that some einstein WU's run very long comparing to others, variation off 7-12 hours to complete.

In general the i7-920s run hot and are safe up until they hit about 100C and at they point they will start shutting themselves down so they won't get hurt. I personally don't like going much over 70C-73C but one of my machines is an old C0 stepping processor so I have to pump 1.4125 vCore just to get 4.0 GHz. That PC runs up into the low 80s but it has been that way for 10 months so I would not bother turning it down more with TThrottle while you find the real answer.

Did you build the system yourself? If so, did you use the fan and heatsink that came with the CPU?

When you cleaned out the case did you get the fan and heatsink that sit on top of the CPU itself? If the fins on that heatsink get clogged it will reduce it's ability to transfer heat away from the CPU. Is the fan on top of the CPU's heatsink still running at full speed? If all that is as clean as you can make it then perhaps it is time to replace the thermal paste that sits between the CPU and the heatsink.

As for WUs taking longer, not too long ago they changed the WUs to include 4 of the old WUs all bundled in to one so they should take longer.

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- Crunch, Crunch, Crunch -
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TJ
TJ
Joined: 11 Feb 05
Posts: 178
Credit: 21,041,858
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Hi, No I didn't build the

Message 97181 in response to message 97180

Hi,

No I didn't build the PC myself. It was from a large PC builder in the Netherlands with it's original cooler from Intel, and is 9 mounths old. I do remember that when I had it a few weeks the PC had turned off itself. That was I think due to high temperature. It was summer here then. I installed Throttle and the PC was running smoothly between 60-65°C. The max. core temp. according to Intel is 67.9°C. So this is (was) okay, until a few weeks ago when I noticed temperatures above 75°C and I don't want that. It is Einstein because when I stop Boinc, temperature drops to around 50°C. To maintain a nice 65°C the CPU is running at 40%, that is not efficient. I thinks this PC has to stop crunching to prevent overheating.

Greetings from
TJ

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