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Is this stable for an air cooled CPU ?

post #1 of 18
Thread Starter 
Q9550 3.77GHz

Idle 22C , Full load for 10 mins Max 56C


See pics for details.

Room temp was 71F at test time.


Edited by whocares - 5/19/08 at 4:01pm
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post #2 of 18
For a real test of stability, do a google search for orthos. You need to run it for at least 6 hours really for total stability. 10 minutes is not really enough. Make sure you monitor temps though so they don't get too out of hand.
post #3 of 18
mate....im seeing 76c on core 2 ...that's burning up !!!!!!!! quick get the fire extinguisher to hand....lol
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post #4 of 18
Thread Starter 
Quote:
Originally Posted by skunksmash View Post
mate....im seeing 76c on core 2 ...that's burning up !!!!!!!! quick get the fire extinguisher to hand....lol
All cores did reach 77C at some point, and got to the 70's rather quick (2min in to the test).

What should be the max temp for the cores under load?

I'm not sure it will go any lower with my current setup, I guess water is calling.
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post #5 of 18
well its well over the stated thermal limit......u need to back off on the clocks or get some serious cooling in there ...

its 45nm the max temps should be no where near that

# CPU Speed: 2.83 GHz
# PCG: 05A
# Bus Speed: 1333 MHz
# Bus/Core Ratio: 8.5
# L2 Cache Size: 12 MB
# L2 Cache Speed: 2.83 GHz
# Package Type: LGA 775
# Manufacturing Technology: 45 nm
# Core Stepping: C0
# CPUID String: 10677h
# Thermal Design Power: 95W
# Thermal Specification: 71.4°C.....<<<< u hit 77c
# Core Voltage: 0.85V-1.3625V
# PECI enabled: Yes
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post #6 of 18
That is weird how CPU is different from cores. Anyway that is HOT, I didn't notice that, well spotted skunk.
I would get a better cooler, that cooler is little better than stock. You may also want to try a remount. For a better cooler, I suggest -
1. Thermalright Ultra 120 Extreme
2. OCZ Vendetta 2
3. Tuniq Tower

Really 45nm should produce less heat. Summits up.
Edited by coffeejunky - 5/19/08 at 3:23pm
post #7 of 18
Thread Starter 
Quote:
Originally Posted by skunksmash View Post
well its well over the stated thermal limit......u need to back off on the clocks or get some serious cooling in there ...

its 45nm the max temps should be no where near that


# Thermal Specification: 71.4°C.....<<<< u hit 77c

That Thermal spec is for the case or Tc. (Measured at the geometric center of the package).

As reported by the BIOS Tc was 56C max well within specs.

I'm not sure how CoreTemp and the other prgs measures the temp at the cores but will do some research about it.

If Tj. Max is 105C as CoreTemp shows, or even 95C as I have read somewhere; Still 77C Max should be well below specs.

I doubt it hit the max temp during the test, when cooling failure occurs, the processor will automatically shut down via THERMTRIP# Signal even if the temp monitors were disabled. (I have T monitor set a 60C).

I could be wrong, that's why I am asking here.

Anyone cares to comment on this?
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post #8 of 18
the bios is the temp of the socket, not the cpu itself

coretemp, realtemp, speedfan etc will all tell you the temps inside the core, which is what you should be bothered about. At 77°c!!!
post #9 of 18
mate i don't see how u believe 77c is acceptable on ANY core let alone a 45nm
i would panic big style if my 65nm 2180 went over 55c

there is something wrong there.....
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post #10 of 18
Thread Starter 
Quote:
Originally Posted by skunksmash View Post
mate i don't see how u believe 77c is acceptable on ANY core let alone a 45nm
i would panic big style if my 65nm 2180 went over 55c

there is something wrong there.....
I believe is acceptable because is 77C Tj (Tjunction) and in the same Coretemp shows Tj. Max =105C.

The 71.4°C refers to the temp in the case of the CPU As measured by the thermal sensor about 56C in this case. Even with a 20% error still below 71.4C

Coretemp reads the Tjunction from a register in the CPU. As far as I know Intel has not publish this number yet.

Also I believe is acceptable because the CPU itself will shutdown if the temp reaches a dangerous temp. (THERMTRIP# Signal).

Again, I could be wrong, so explain what am I missing here.

By the way, real temp shows a totally different temp. So I guess those temps can't be trusted.

CORETEMP work description (Quoted from the website)
Quote:
This is how the program works:

Intel defines a certain Tjunction temperature for the processor. In the case of Yonah it is 85C° or 100C°. First of all the program reads from a Model Specific Register (or MSR), and detects the Tjunction temperature. A different MSR contains the temperature data, this data is represented as Delta in C° between current temperature and Tjunction.

So the actual temperature is calculated like this 'Core Temp = Tjunction - Delta'

The size of the data field is 7 bits. This means a Delta of 0 - 127C° can be reported in theory. But from preliminary tests, the reported temperature doesn't go below 0C°, no matter what kind of cooling was used.


Edited by whocares - 5/19/08 at 4:58pm
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RAID 0 3X 320 GB WD Caviar SATA 300 7200rpm 16MB LITE-ON DVDRW LH-20A1S Vista Ultima 64 Bits, XP 32 Bits Dual boot 750W 
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