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2500K Idle temps too high?

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a b à CPUs
July 13, 2013 3:29:09 AM

Basically I'm curious as to what the idle temperature of the i5 2500K should be under a mid range closed loop cooler.

I noticed the other day that it was idling just shy of 40 degrees without any overclock applied. That seemed a bit high to me so I ran prime 95 for a couple of hours to make sure there was no issue. Temps peaked in the 60's so I'm not too concerned about that.

40 seems a little high for an idle temp in a windows environment. Any thoughts or ideas to what it might be?

Further info: I'm running the i5 on a Asus Maximus IV Z68 gen3 board and have been using HW Monitor to view temps.

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a c 91 à CPUs
July 13, 2013 4:32:28 AM

I have not applied any sort of overclocks but my 2500K is idling on 52 - 55 C all the time. This has been going on since last year, so far no unexpected shut downs, no lag in any game, or any trouble like that. But that is not high for any reason other than actual temperatures. In winters CPU temperature drops to 30C (Ambient room temperature is 20C) and in summers it rises to 50C (Ambient room temperature is 40C).

A CPU can withstand temperatures up to 95 C without any trouble (TJ Max is 99 C) in most cases. 40 C is no problem at all.
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a b à CPUs
July 13, 2013 4:57:05 AM

if you want to try getting lower temperatures you could re apply the thermal paste.

clean off the old stuff with isopropyl alcohol and apply a rice grain amount of thermalcompound to the centre of the cpu, then place the heatsink down squarly over the cpu and push down and twist side to side slightly then clamp the cpu.

i would say 40 is high for idle considering a friend of mine has an older phenom II 1050t with stock cooler and it rarely gets higher than 50 under load

my phenom II 955 only ever gets up to 45 under load and overclocked but then i have a zalman cnps9900 and very good airflow.
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a b à CPUs
July 13, 2013 7:15:27 AM

mauller07 said:

i would say 40 is high for idle considering a friend of mine has an older phenom II 1050t with stock cooler and it rarely gets higher than 50 under load

my phenom II 955 only ever gets up to 45 under load and overclocked but then i have a zalman cnps9900 and very good airflow.


don't take this wrong, but if you don't know anything about Intel vs AMD you should not comment. I have only built AMD and even I KNOW 60-65C is peak load for the AMD processors your citing, while Intel peak is around 100C. 40C at idle for an Intel i5 (ESPECIALLY on midrange closed loop) is TOTALLY fine. Actually pretty decent.

And only load temp is actually important. Which is way way low for him at 60C. You just shouldn't advise people on things if you have no idea on the normal operating range or how things compare. You just give out false info
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a b à CPUs
July 13, 2013 7:20:22 AM

unksol said:
mauller07 said:

i would say 40 is high for idle considering a friend of mine has an older phenom II 1050t with stock cooler and it rarely gets higher than 50 under load

my phenom II 955 only ever gets up to 45 under load and overclocked but then i have a zalman cnps9900 and very good airflow.


don't take this wrong, but if you don't know anything about Intel vs AMD you should not comment. I have only built AMD and even I KNOW 60-65C is peak load for the AMD processors your citing, while Intel peak is around 100C. 40C at idle for an Intel i5 (ESPECIALLY on midrange closed loop) is TOTALLY fine. Actually pretty decent.

And only load temp is actually important. Which is way way low for him at 60C. You just shouldn't advise people on things if you have no idea on the normal operating range or how things compare. You just give out false info


im saying cooler temperatures are always better, im not comparing peak temperatures.

his newer processor should be running a lot cooler than it is considering it runs at lower voltages and was built on a smaller node.
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a b à CPUs
July 13, 2013 7:27:31 AM

mauller07 said:
unksol said:
mauller07 said:

i would say 40 is high for idle considering a friend of mine has an older phenom II 1050t with stock cooler and it rarely gets higher than 50 under load

my phenom II 955 only ever gets up to 45 under load and overclocked but then i have a zalman cnps9900 and very good airflow.


don't take this wrong, but if you don't know anything about Intel vs AMD you should not comment. I have only built AMD and even I KNOW 60-65C is peak load for the AMD processors your citing, while Intel peak is around 100C. 40C at idle for an Intel i5 (ESPECIALLY on midrange closed loop) is TOTALLY fine. Actually pretty decent.

And only load temp is actually important. Which is way way low for him at 60C. You just shouldn't advise people on things if you have no idea on the normal operating range or how things compare. You just give out false info


im saying cooler temperatures are always better, im not comparing peak temperatures.

his newer processor should be running a lot cooler than it is considering it runs at lower voltages and was built on a smaller node.


LMFAO. No. It shouldn't. You are totally not getting the normal operating temp rang of Intel vs AMD
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a c 91 à CPUs
July 13, 2013 8:47:54 AM

@mauller - AMD's peak temperature is around 60C while Intel's peak temperature is around 100C.

You also have to consider the fact that whether he is staying in a warm country or not. India is the perfect example here.

In winters, temperatures of Northern India stick to 10 - 20 Min - Max. That gets my CPU to idle at 30C.
In summers, temperatures get around 30 - 45 Min - Max. Then CPU idles at around 50C - 55C.

If he is living in Africa, India, Texas or anywhere close to Equator, his CPU temperature would be higher than you if you live in Washington DC or anywhere as cold as that.

Please do not argue.
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a c 139 à CPUs
July 13, 2013 8:50:41 AM

update bios can fix the sensor mobo
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a b à CPUs
July 13, 2013 7:48:06 PM

@Luckiest Charm
You know, you hit the nail on the head. It's been hot here in Eastern Canada the past few weeks, even in my basement. It was running fine just a few weeks back when it was hovering around 17 degrees outside. Now it's pusing past 30 during the daytime.

I thought it might be a bad sensor or my cooler getting ready to die (already experienced this wonderful event once before), because the thermal paste is applied correctly and I've alternated between bios versions. When it cools down later this week, I'll check my idle temps again.
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a c 91 à CPUs
July 13, 2013 10:22:25 PM

Its all good mate. :) 

Check results and post back here soon.
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