CPU Temperature Poll

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Profile Rick B

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Message 912200 - Posted: 28 Jun 2009, 2:01:34 UTC

Whats your CPU Temp?

I recently cleaned my computer hoping for a temperature decrease and a performance increase which did neither as it wasn't to bad. When I bought this new computer and got back into seti, after years of being away, it was running the dual core at around 49 Deg C and over the next couple of months temperature increased steadily as did the outdoor temperatures. This last week summer FINALLY arrived in Southern Ontario Canada and we hit our first 30 Deg C Days (Humidex pushing 35) and I found my computer reaching the low 60`s and the computer was freezing up. Ive had TThrottle on the computer monitoring cpu temps and have now enabled the program. CPU performance is now down around 75% or less to maintain temperatures less than 60 Deg C. I`ve seen and read the fan review link posted in another thread but most of it currently beyond my knowledge of computers and what will and what won`t fit or work in my computer. Continued reading and visits to the computer outlets will continue but I wanted to get an idea where your rigs are running on 24-7 crunchers and what things have you done to improve cooling without reducing performance.

Thanks in advance for any and all input.


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Message 912202 - Posted: 28 Jun 2009, 2:16:01 UTC - in response to Message 912200.  

Whats your CPU Temp?

I recently cleaned my computer hoping for a temperature decrease and a performance increase which did neither as it wasn't to bad. When I bought this new computer and got back into seti, after years of being away, it was running the dual core at around 49 Deg C and over the next couple of months temperature increased steadily as did the outdoor temperatures. This last week summer FINALLY arrived in Southern Ontario Canada and we hit our first 30 Deg C Days (Humidex pushing 35) and I found my computer reaching the low 60`s and the computer was freezing up. Ive had TThrottle on the computer monitoring cpu temps and have now enabled the program. CPU performance is now down around 75% or less to maintain temperatures less than 60 Deg C. I`ve seen and read the fan review link posted in another thread but most of it currently beyond my knowledge of computers and what will and what won`t fit or work in my computer. Continued reading and visits to the computer outlets will continue but I wanted to get an idea where your rigs are running on 24-7 crunchers and what things have you done to improve cooling without reducing performance.

Thanks in advance for any and all input.


The answer to your question depends very much on whose CPU, and which one.

For a Pentium 4, 75 degrees (c) is the upper limit.

For an AMD Athlon, it should be good to 90 degrees.

... but the maximum allowed temperature varies alot, even with the same manufacturer.

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Message 912204 - Posted: 28 Jun 2009, 2:17:45 UTC - in response to Message 912200.  
Last modified: 28 Jun 2009, 2:23:12 UTC

Is this your Pentium D or the E2100 that's giving trouble?
Either way there is some sort of cooling problem with the system (or even the Power Supply). The Pentium4 series of CPUs ran hot; very hot (they actually ran hotter then the AMD K6s, which were the ones that gave AMD the reputation of hot running CPUs- even though it was only that series & Intel well & truely beat them for the title with their P4's).
I've got an E6400 running at stock speed. It's temps are between 51°-53°c and that's at an ambient temperature of 30°c. When things get hot & sticky the ambient gets up to 36°c+ & the RH 90% and higher. CPU temps never get higher than around 56°c and that's using stock cooling.

For any CPU 60°c isn't that warm & shouldn't cause any problems at all. While throttling the CPU speed down sorts the problem out, it may not be due to the CPU getting hot, but the PSU getting hot & it's regulation failing under the load & heat combined.
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Message 912206 - Posted: 28 Jun 2009, 2:32:38 UTC - in response to Message 912202.  

The answer to your question depends very much on whose CPU, and which one.


The whats your temp question is more for interest sake. The real question i guess Im asking is what simple mods have 24-7 crunchers done to improve cpu cooling?

Is this your Pentium D or the E2100 that's giving trouble


Its the Pentium Dual Core E2180 @ 2.0 Ghz. The processors data sheet says the Max Tc at 65W is 61.4 Deg C. ... Granted I'm not really sure what that means other than the fact that when the cpu hit the low 60's it froze up.

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Message 912207 - Posted: 28 Jun 2009, 2:36:50 UTC - in response to Message 912206.  

The answer to your question depends very much on whose CPU, and which one.


The whats your temp question is more for interest sake. The real question i guess Im asking is what simple mods have 24-7 crunchers done to improve cpu cooling?

On my ancient Athlon XP, it's 47 degrees C. My Core2 laptop runs hotter, and I haven't checked the C7.

Those who are fanatic about crunching always go with the biggest, baddest 3rd party heatsink they can find (if they don't actually go phase-change or liquid cooling). Faster (noisier) fans are popular. More fans help.

The key is to get the inside of the case as near ambient as possible, and you do that by flowing lots of air -- and to get the CPU colder by getting the heat away from the chip and into that air.
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Message 912209 - Posted: 28 Jun 2009, 2:42:58 UTC - in response to Message 912207.  

This is the one Im considering but it may be overkill
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Message 912210 - Posted: 28 Jun 2009, 2:48:45 UTC - in response to Message 912206.  
Last modified: 28 Jun 2009, 2:49:37 UTC

The whats your temp question is more for interest sake. The real question i guess Im asking is what simple mods have 24-7 crunchers done to improve cpu cooling?

Its the Pentium Dual Core E2180 @ 2.0 Ghz.

To satisfy the "for interests sake" my E2180 is running at 48C, stock cooler and it's about 85F in the house when it's at that temp. When it cools down later during the day, it's more like 45C. Mine has a very slight OC going ATM.
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Message 912211 - Posted: 28 Jun 2009, 2:55:36 UTC - in response to Message 912210.  

The whats your temp question is more for interest sake. The real question i guess Im asking is what simple mods have 24-7 crunchers done to improve cpu cooling?

Its the Pentium Dual Core E2180 @ 2.0 Ghz.

To satisfy the "for interests sake" my E2180 is running at 48C, stock cooler and it's about 85F in the house when it's at that temp. When it cools down later during the day, it's more like 45C. Mine has a very slight OC going ATM.


Those are the temperatures I used to have and want to get back to. I dont overclock and have kept it clean. Only thing I changed was going to optimized apps. I run 2 projects with equal resource sharing.

Rick
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Profile Byron S Goodgame
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Message 912213 - Posted: 28 Jun 2009, 2:58:36 UTC
Last modified: 28 Jun 2009, 3:00:37 UTC

Read this on one of the reviews from TD

Not for the novice installer, as installation requires almost a total teardown as the new mounting plate is UNDER the MB
so might be something to consider. Also the temps I mentioned are running the opti apps. Idle is in the high 30's for my sys.
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Message 912220 - Posted: 28 Jun 2009, 3:53:00 UTC - in response to Message 912206.  

Is this your Pentium D or the E2100 that's giving trouble

Its the Pentium Dual Core E2180 @ 2.0 Ghz. The processors data sheet says the Max Tc at 65W is 61.4 Deg C. ... Granted I'm not really sure what that means other than the fact that when the cpu hit the low 60's it froze up.

Even with a slight overclock & optimised applications the stock cooler on that CPU should be more than sufficient.
I'd re-check the mounting of the heatsink on the CPU, and check the BIOS for the fan speed control- set it to Auto or high (or whatever they've got in there). If it's a stock cooler it shouldn't be a problem, but i have had fans mounted upside down so they sucked instead of blew. Made a huge difference to the CPU temperature when they were re-fitted the right way.
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Message 912222 - Posted: 28 Jun 2009, 3:55:36 UTC - in response to Message 912209.  

This is the one Im considering but it may be overkill

Just slightly.
You'd use something like that if trying for 4GHz+ overclocks & don't want to go with water cooling.
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Message 912231 - Posted: 28 Jun 2009, 4:58:12 UTC - in response to Message 912200.  

Running BOINC 24\7, optimized apps for SETI, Einstein, MilkyWay on Xeon X3360. All 4 cores is around 79 Celsius. Pair of Xeon X5355's, running the same apps, same load (24\7), having 69-72 Celsius.
Measured by Hardware Monitor.
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Message 912239 - Posted: 28 Jun 2009, 6:05:38 UTC - in response to Message 912220.  
Last modified: 28 Jun 2009, 6:21:27 UTC

I'd re-check the mounting of the heatsink on the CPU, and check the BIOS for the fan speed control- set it to Auto or high (or whatever they've got in there). If it's a stock cooler it shouldn't be a problem, but i have had fans mounted upside down so they sucked instead of blew. Made a huge difference to the CPU temperature when they were re-fitted the right way.


I reset the heat sink with a Silicone Based Heat Sink Compound and ensured the fans were remounted as they had been. CPU Fan is mounted blowing down onto the heat sink and the rear case fan blowing out the back of the computer. When I restarted the computer, and Boinc, it immediately went to 60 - 62 Degrees. I activated and set TThrottle at 58 and it worked well and kept it there for about 4 hrs. Ive now shut Boinc down and the temperature decreased to 39 degrees in approx 7 minutes where it has remained for the past 10 minutes.

I am unsure how to check my BIOS but I do remember having an issue with this computers SLEEP Mode (Vista) out of the Box and HP had me update the BIOS but I have no idea how to access it. The update never did fix the Sleep Mode Issue.

Edit: Upon restarting Boinc with TThrottle disabled the CPU temp went from 39 to 60 in 5 minutes then went to 63 or 64 in the next minute and the fan seemed to go into high speed mode where the temperature has now dropped back to 58 - 59 degrees. As its 2 am Im gonna let it carry on without the TThrottle and let the cool night air do the cooling for now.
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Message 912241 - Posted: 28 Jun 2009, 6:20:36 UTC - in response to Message 912239.  
Last modified: 28 Jun 2009, 6:23:38 UTC

I reset the heat sink with a Silicone Based Heat Sink Compound

How much compound did you use?
The biggest mistake people make is thinking more is better- it actually makes it worse. All you want is just a thin smear over the CPU. The idea is to fill in the minute gaps between the CPU & heatsink- thermal paste is a better heat conductor than air. If you apply too much paste you end up with heatsink paste between the heatsink & the CPU, instead of mostly metal to metal contact. This actually acts to insulate the heatsink from the CPU and not conduct heat like you want it to.
I generally smear a coat over both the CPU & the heatsink & then scrape over the top of each using a stiff card with a nice straight edge (eg old credit card, video reantal card etc) then fit the two together.
End result- maximum possible heat transfer.
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Message 912252 - Posted: 28 Jun 2009, 7:53:37 UTC

I had my Q6600 go into thermal slowdown due to dustbunnies in the heatsink after about 8 months. Standard heatsink and clock speed. It still ran OK, just clock speed was 1.4 instead of 2.4 so RAC dropped like a stone.

Right now PC Wizard says cores are around 72C which is well within spec.

I think I will need to vacum out the heatsink again before the weather warms up though. A CPU that doesn't run at 100% 24/7 will probably be fine with a few dust bunnies, but with running SETI it needs the cooling to work properly.

I did scrape off the factory chewing gum heatsink conpound and apply some generic silver stuff last time though. Just a thin film of course, less is more. Just use a small blob and smear it out with an old credit card.

To improve your cooling you have two simple options.

Probably the best is to install a couple of exta case fans, especially a side vent one blowing fresh cool air down on the CPU.

A better CPU heatsink will help too, but unless you are overclocking the standard one will do the job, as long as it clean.

If you are running stock speeds, better cooling wont gain you anyting, as long as the stock cooling is working properly.

Ian
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Message 912253 - Posted: 28 Jun 2009, 8:12:03 UTC - in response to Message 912252.  

Probably the best is to install a couple of exta case fans, especially a side vent one blowing fresh cool air down on the CPU.

That can actually reduce the efficiency of the CPU cooler. The CPU fan isn't able to blow as much air over the heatsink if it's air supply is turbulent (ie moving).
Having a duct in the side of the case though does make a significant difference. Make it so that the duct is centred over the CPU fan & the edge of the duct goes down to at least the top of the fan (even better if it can be lower, but that makes it very difficult to fit the side panel back on). That way the CPU fan is getting air at the ambient temperature and not at the internal case temperature (which can be 5°c or more above ambient).
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Message 912255 - Posted: 28 Jun 2009, 8:24:12 UTC - in response to Message 912253.  

My SUN WS has a CPU fan, a PSU fan and a bigger fan on the back panel. The front panel is a mesh. The manual says not to take away the side panel, this may damage the CPU. It has been working 24/7 since January 2008, except for vacation holidays. CPU is an Opteron 1210 at 1.8 GHz, 2 GB RAM, 2 hard disks, no GPU. I am running 6 BOINC projects on SuSE Linux.
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Message 912256 - Posted: 28 Jun 2009, 8:38:10 UTC - in response to Message 912252.  

had my Q6600 go into thermal slowdown due to dustbunnies in the heatsink after about 8 months. Standard heatsink and clock speed. It still ran OK, just clock speed was 1.4 instead of 2.4 so RAC dropped like a stone.

Right now PC Wizard says cores are around 72C which is well within spec.

Ian

Really? I thought the specs called for it to be lower. Mine stays below 60 most of the time, except on the really hot days here. Guess they're doing better than I thought.
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Message 912257 - Posted: 28 Jun 2009, 8:42:21 UTC
Last modified: 28 Jun 2009, 8:46:16 UTC

Hi Rick,

I've had temperature problems ever since I went from a standard Athlon XP3200+ to an X2 6000+. From that I upgraded to a 9850 Phenom, and my idle temps were 42-44c and load under seti 56-62c. It finally caused my old motherboard to fail. I put together a new system with an Phenom II 955, and put it into my old case, and temps were about the same. I had coretemp putting the system to sleep when it got too hot at 62c. Just transferred the whole system into an Antec 900-2 case, and my idle temps are 33c and load 44c with the new case and a Xigmatec S1283-HDT cooler (room temps are approx 25-26c). I've rebuilt the 9850 system with less stuff in the case (using spare parts and a new motherboard and the temps are roughly the same as before, 42-44c idle, and 56-58 load. It's in a cooler part of the house tho, but it was definitely the case causing the problems in my system.

Think the TEC is overkill, and some reviews I've read don't put it any better than a good air cooler. Try reading a few reviews on http://www.frostytech.com/

They seem to be pretty good at reviewing them, and normally do a top 10 of the best tested AMD and Intel coolers. The best in one is not necessarily the best in the other.

Edit - Your choice of Thermal goop can be quite important too. I've just re-installed mine with OCZ Freeze, but other good brands are Arctic Silver 5, Arctic Cooling MX-2, and there are a few more.


Hope that helps.

regards, Gizbar.


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Message 912260 - Posted: 28 Jun 2009, 9:17:38 UTC - in response to Message 912257.  
Last modified: 28 Jun 2009, 9:18:38 UTC

Hi, except for the HP LT (60-65C) the Pentium 4 DUAL820 runs hot 85-87C, but my Q6600 (@2,8GHz), even now, runs too hot 95-105C! Then it throttles back.(108C)
The other 2 QUAD's run @ 65-75C.

Even for the Lowlands it's hot, again, since a week.

Don't know how trustworthy these readings are. I'de like to use a 'thermo-couple'. But they aren't easy to get and should fit between CPU and cooler.
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