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CPU temp/cooler speed problem - or not?

MB: Asus P5B
CPU: Intel C2D E2160 1.8GHz@2.7GHz with box cooler
RAM: DDR2 Transcend 1GB 800MHz@750MHz

Idle CPU temp is 32C (at this moment), MB 23C. When I start some testing tools, like Orthos or Prime96, the CPU temp increases immediatelly to 50+C, and is going slowly up to 65C. The Fan speed is usually between 1600-1800, altough I have set q-fan in BIOS to disable.

My question is: is this major temp increment normal, is this fan speed normal, should it be higher? Any suggestions?

Thanks, Goran
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Priest04
Asked:
Priest04
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2 Solutions
 
Gary CaseRetiredCommented:
A significant temperature increase is normal; but yours is getting higher than it should.   I'd expect it to immediately jump into the upper 40's; and climb into the mid-50's if it is kept at 100% utilization (e.g. Prime, Orthos, or another CPU-intensive program) for a length of time.

The thermal specification for an E2160 is 61.4 °C => so you are clearly overheating the CPU beyond its spec; which is not a good idea :-)

Your fan speed seems somewhat low for a stock cooler ==> what happens if you enable Q-Fan in the BIOS?   It is supposed to adjust the fan speed as needed to keep the CPU adequately cooled ... so try that and see if it changes your results.

If that doesn't do it; you most likely do not have a good bond between the CPU and heatsink.   This requires that you CAREFULLY remove the heatsink;  clean off all of the current thermal compound [scrape it carefully with a credit card; then clean it off both the CPU and heatsink with isopropyl alcohol];  and then re-mount the heatsink, using new thermal compound.    If you do this, I'd suggest using Artic Silver 5 compound => follow the directions on their website to be sure you apply it correctly.
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Gary CaseRetiredCommented:
... one other possibility is that you have a defective fan on the heatsink; but this is fairly unlikely.   You may want to consider using a better 3rd party heatsink/fan combination if this isn't easily resolved by just enabling Q-Fan.
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jamesaskhamCommented:
Generally this depends on two main factors:

Firstly if you are using the stock cooler (i.e. the one that came with the processor in the box) you will find temperatures will (generally speaking)  be higher than a good quality 3rd party fan/heatsink combination. The sharp rise in temperature could be due to an uneven distribution of thermal paste between the CPU and the heatsink, so this might be a good (and cheapish) course of action. An Artic Cooling Freezer Pro 7 would be my choice, you can pick them up for ~£10 at the moment.

The second factor is how well your case cools, which is a combination of what fans you have working and how the air can flow through the case. You should try the same test with the side of the case off (just for a test) and see if the same jump occurs.

65C is within the thermal specs for the C2D but it's higher than I would personally be happy with. I do however have friends who do run their C2D rigs (overclocked I'll concede) hotter than that.

It all depends what you are happy with, I personally don't like running a CPU about 50C - but some of my friends have always run their CPU's just under their thermal limit, generally without issue.

My best advice would be to get a good quality CPU cooler, and make sure you fit it the right way round (yes I have seen rigs with the AC Freezer Pro fitted sideways, much to my amusement).

If you need anything else, let me know.

Thanks.
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jamesaskhamCommented:
Ignore my post, beaten to the punch.

Thanks.
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Gary CaseRetiredCommented:
jamesaskham ==>  Just to be sure you noticed, your comment " ... 65C is within the thermal specs for the C2D ..." is WRONG.   The thermal spec for an E2160 is 61.4 °C.

Running above the thermal spec doesn't automatically destroy a CPU => in fact Intel's CPU's have built-in thermal protection that will shut down the CPU before they are destroyed by overheating (this doesn't mean they can't be damaged this  way ... but does reduce the likelihood).    But it's definitely not a good idea to run above spec if you can avoid it :-)
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jamesaskhamCommented:
It says here 70C: http://processorfinder.intel.com/details.aspx?sSpec=SLA8Z, but I could be wrong.

Also, " Intel C2D E2160 1.8GHz@2.7GHz with box cooler"

Does this mean you've overclocked it to 2.7GHZ - as that will be why you are running so hot!

Only just noticed that actually, you really should invest in a decent 3rd party heatsink for this kind of OCing.

Thanks.
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Gary CaseRetiredCommented:
You're right on the thermal spec ==> the newer s-spec versions have a higher rating.

Good catch on the increased clock ==> clearly this is being significantly overclocked !!   That almost certainly explains why the temps are out of line !!

Priest04 ==>  If you run the CPU at its designed speed, I suspect your temperatures will be MUCH better.   If you're going to overclock it (you're currently running a 50% overclock) you should definitely replace the cooler with a better unit.
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jamesaskhamCommented:
I agree with Gary on this, you really should buy a decent cooling system for this level of overclocking.

If you really don't wish to change your cooling system, then I would suggest lowering your overclock by at least 300mhz and check the results. Aim for 50C under load as a max.

Gary -> Have just spotted the other ones on the Intel site (same model, different versions) which is indeed ~60C, will depend which version Priest actually has. Will make sure I double-check in future!

Thanks.
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Priest04Author Commented:
:) Ok, folks, let me be more detailed, it seems I need to.

I have deliberately put info about my PC and overclocking info in first 3 lines, thinking everyone will notice them. Yes, I know I will have better temps with some better cooler, but if you do a little research on the web, you will see that there are many (and truly many) people saying they run E2160 CPU @3GHz with stock cooler, so 50% overclock of this CPU should not be that significant.

My question was not why am I running so hot. My questions were:

1) is 1600 rpms normal speed for stock cooler, or should it be higher?
2) is 20 degrees of immediate increase after Orthos is started normal, or should be less?

I don't want my temps to be better while having my CPU run @1.8GHz, this would be a total waste of MHz's. I also know I can run it @3GHz with better cooler/paste, just I want to know what is my best score with this stock cooler. is this behaviour (cooler speed, temp increase) normal, or not.

Setting q-fan to enabled will only make things worse, the reason why I have it disabled. CPU temp will raise up to 65C while cooler will be running on 1000rpms.

Another thing: you both gave CPU correct specs about highest temp for this CPU. There are 2 versions of E2160

1) conroe 61.4 (mine)
2) allendale 73.2

Goran
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Priest04Author Commented:
Ah, didn't see jamesaskham's last post (didnt reload the thread), seems he has already found that there are 2 types of E2160.

Goran
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jamesaskhamCommented:
1) I believe the max RPM of the stock coolers is around that value.

2) Depening how the thermal paste is applied and considering the speed of the stock cooler (and general performance), a rise of 20C under load doesn't suprise me. Especially given the overclock, this is an acceptable rise.

Also, considering the cost and performance of a cheap(ish), but good quality, 3rd party heatsink/fan, it may be worth your while purchasing one in the near future (you will also be able to overclock the chip further). This is especially important as you have the conroe chip with the lower thermal rating.

Thanks.
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jamesaskhamCommented:
You could also try Speedfan to check the above.

http://www.almico.com/sfdownload.php
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Gary CaseRetiredCommented:
While I personally choose to not overclock, I'm well aware that the Core 2's are excellent overclockers.   I think your fan is running just fine ==> my suggestion to try the CPU at the specified clock speed isn't intended to mean you shouldn't overclock ... but to see what the thermal performance is at that speed.   This will confirm that your stock cooler is indeed working as designed and keeping the CPU temps well under the thermal spec of 61.4 °C

To answer your question r.e. is a 20 °C temperature increase normal -- Yes, it is.   As I noted before, I'd easily expect a very quick 15 °C increase with Orthos, and another 5 - 10 °C as it continues to run.   So with a 32 °C idle temp, it would be very reasonable to temperatures in the 55-58 °C range after 15 minutes or so (they should then just stay there and not get any higher with time).   I suspect your system is working just fine -- you're simply pushing the temps up because of the overclock.

Running the CPU 5% above its thermal spec for any length of time is not a particularly good idea;  but these are pretty robust processors ... so it probably won't destroy it.   Nevertheless, I would get a better cooler that do keep the temperatures under the thermal spec.   For example, a Zalman CNPS-9500 has a thermal spec of only 0.12 °C/W ==> this means that with a full 65w of thermal power (the rating for your chip) the temperature would only increase by 8 0.12 °C !!   Real-world performance is usually not quite that good (there are other factors in dissipating heat inside the case; plus you are likely drawing more than the rated TDP at the higher clock); but that's nevertheless superb power dissipation.
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jamesaskhamCommented:
Has any of our advice helped?

Have you considering buying a new heatsink/fan like a Zalman or Artic Cooling?

If you need anything else, let me know.

Thanks,

James.
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Priest04Author Commented:
I didnt have time to remove original "gum" and to put paste between cooler and cpu, since I believe its where the problem lies. I have set cpu to defalt speed, and when I fully load cpu, the temperature goes up to 56-57. This is hogh temperature considering its not summer anymore, and days are gettting colder. Most definetely during the summer days it would break the 61 degrees boundary.

I will award to both of you the points, sine I don't know when I will have time to deal with this, and no need to keep this topic open anymore.

Thanks, Goran
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