Sign in with
Sign up | Sign in
Your question

Weird CPU temperature

Last response: in CPUs
Share
May 23, 2011 9:16:42 AM

I am using an Intel Core 2 Quad Q9650 running at 3GHz, normally using about 90% of the capacity of all four cores on a Rampage Extreme mobo. I have been monitoring the temperature for some time and have noticed that in the last fortnight there have been about 4 or 5 occasions when the 'CPU' temperature as shown on AI Suite has changed from about 55C, plus or minus 2C to an almost steady 67C. Reducing the load on the CPU so that each core only uses 5% of capacity made no difference to the 'CPU' temperature.
However, this only happens during the night time. I have now been logging the cpu temperatures for several days using Speedfan and in the early hours of this morning the 'CPU' temperature again moved up to 67C.
These are the stats from the Speedfan log from midnight until 06:25, just before the 'CPU' temperature shot up.

CPU Core 0 Core 1 Core 2 Core 3
Avge 56.8 65.2 58.4 58.4 59.6
Max 59 68 60 62 62
Min 52 59 54 52 54
These are the stats from 06:25 until I dropped the CPU load to 5%.

CPU Core 0 Core 1 Core 2 Core 3
Avge 67.5 61.1 54.6 53.6 55.3
Max 68 65 58 58 60
Min 67 55 50 48 50
These are the stats from 06:50 until I switched the computer off a few minutes later, as this is the only way to get the 'CPU' temperature down.

CPU Core 0 Core 1 Core 2 Core 3
Avge 65.5 40.8 38.6 37.3 38.4
Max 65.5 42 42 43 43
Min 65.5 40 37 36 38
It is obvious that the 'CPU' temperature is not the average, maximum or minimum of the four core temperatures so does anyone know what it is measuring.
Does it mean that my CPU is about to fail?
Any help will be appreciated as I have no idea if I need to do anything about it.
I have briefly used PC Probe II and it shows the MB temp as between 29 and 31C, SB is between 45 and 48C, NB varies between 50 and 57C, and Power between 31 and 44C. The lower temperatures are, unsurprisingly, when the cpu has very little load.
Viv

More about : weird cpu temperature

May 23, 2011 9:35:32 AM

Failing CPu i'm not sure about. More obvious question that comes to mind is what was the CPU fan doing at the time of the high temperatures? Or other fans for that matter that help airflow in your computer case. And what kind of load were the cores under at that time?
m
0
l
May 23, 2011 9:53:18 AM

roald said:
Failing CPu i'm not sure about. More obvious question that comes to mind is what was the CPU fan doing at the time of the high temperatures? Or other fans for that matter that help airflow in your computer case. And what kind of load were the cores under at that time?


CPU load at about 23:00 last night was around 90%, 'CPU' temp showed 58C, CPU fan 1622 rpm,
At 06:45 when computer alarm alerted my CPU load still 90%, 'CPU' temp 67C, CPU fan 2057rpm,
Ten minutes later, after reducing CPU load to 5%, 'CPU' temp 65C, CPU fan 1917, but core temps 41, 38, 36 and 38C, approximately.
The side case fans were probably running at about 1000rpm, and the top ones a little faster. My first reaction was to speed up all of the fans as I thought the alarm was caused by one of them. It took me a little time to realise that it was PC Probe II, (made by Asus), which was making the alarm as it had been a couple of years since I last used it.
Viv
m
0
l
Related resources
a b à CPUs
May 23, 2011 10:02:29 AM

could you try coretemp as your new software monitor?See how it fares against speedfan temps.
m
0
l
May 23, 2011 10:06:28 AM

If all else is running as normal, might also be a defective thermal sensor.
m
0
l
May 23, 2011 11:04:32 AM

ghnader hsmithot said:
could you try coretemp as your new software monitor?See how it fares against speedfan temps.


I have just installed coretemp and it is giving readings which look the same as Speedfan's readings for the 4 cores but coretemp does not appear to monitor 'CPU' which Speedfan, AI Suite and PC Probe do. The 4 core temperature readings given by Speedfan and PC Probe look as if they are the same.

Viv
m
0
l
May 23, 2011 11:05:10 AM

roald said:
If all else is running as normal, might also be a defective thermal sensor.


That does seem to be a possibility. Thanks.

Viv
m
0
l
a b à CPUs
May 23, 2011 11:45:22 AM

no.I think you should install new TIM so that the temps would go down.How many years or months has this pc been in use?
m
0
l
May 23, 2011 12:00:37 PM

ghnader hsmithot said:
no.I think you should install new TIM so that the temps would go down.How many years or months has this pc been in use?


What is a TIM?

I built the computer when Win 7 first came on the market. Oct 2009? It will have been running almost continuously ever since.

Viv
m
0
l
May 23, 2011 12:30:41 PM

ghnader hsmithot said:
thermal paste.


Thanks, I will do that.

Viv
m
0
l
!