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Stable overclock reached and Temperatures

Forum Overclocking : CPUs - Stable overclock reached and Temperatures

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tesseract08   05-30-2009 at 02:11:39 AM

Tjunction:
Min idle: 42C (Real Temp)
Max load: 77C (Real Temp)

Tcase:
5C less than Tjunction.


Ambient = 70F
Chipset = X58
CPU = i7 920
CPU Cooler= Coolermaster V8
Frequency = 3.6 Ghz
Speedstep/Turbo = Disabled
Load = Prime95 - Small FFT's - 9 hours (Stable)
Motherboard = Asus P6T
Stepping = C0/C1 (CPUID)
Core Voltage = 1.168V (CPUID)
Turbo Fan = Off (BIOS)

Open case, Cooler Master HAF 932.

Hey so I played around and finally got a stable overclock, I think. Looking at Comp's scales I realize the Tjunction temps on load is a little high for the recommended 68C load on TCase. I changed my CPU fan to a Coolermaster V8, it seems to be performing better than the Zalman 9900, and it is more quiet.

What do you guys think? Is the load temp too high? Is it a big deal? The way I justify it is: how often am I going to stress all 4 cores at 100%? I am only playing games.

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CompuTronix   05-30-2009 at 12:50:24 PM
- 0 +

What is your ambient temperature?

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CompuTronix   06-02-2009 at 09:08:08 PM
- 0 +

Are you testing with all fans at 100% RPM? At 22c standard ambient and only 1.168 Vcore, your core temperature is still 4c above spec. Is 77c your hottest core? What is your "average" or "mean" core temperature at 10 minutes Prime95 Small FFT's?

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tesseract08   06-03-2009 at 12:34:14 AM
- 0 +

CompuTronix,

The fans in my CM HAF 932 do not have speed options so I presume they're functioning at 100%.

My Coolermaster V8 does however have a speed knob. I don't believe I had it on its highest setting when I did those tests.

Here are some more results from tests I just did.

Tjunction:
Min idle: 39C (Real Temp - coolest core)
Max load: 75C (Real Temp - hottest core)

Load Avg.: 73.25C (Avg of all core max's)
Idle Avg.: 40.25C (Avg of all core min's)

Lowest load core: 70C
Lowest idle core: 39C

Tcase:
5C less than Tjunction.


Ambient = 22C
Chipset = X58
CPU = i7 920
CPU Cooler= Coolermaster V8
Frequency = 3.6 Ghz
Speedstep/Turbo = Disabled
Load = Prime95 - Small FFT's - 10 min
Motherboard = Asus P6T
Stepping = C0/C1 (CPUID)
Core Voltage = 1.168V (CPUID)

Closed case, Cooler Master HAF 932.

Reply to tesseract08
CompuTronix   06-03-2009 at 02:52:23 AM
- 0 +

Thank you for the update. Forgive me, but at this point, I must ask a fundamental question; are you certain that the protective cover was removed from the bottom of your Heat Sinc prior to installation?

Considering your hardware configuration and Vcore, the temps are unusually high. I've duplicated your ambient and settings on my rig; idle is 5c lower and load is 14c lower on a smaller cooler. There must be an explanation somewhere.


Message edited by CompuTronix on 06-03-2009 at 02:55:37 AM
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tesseract08   06-03-2009 at 02:57:22 AM
- 0 +

I'm fairly certain that I have. But I shall double check. I'll get back to you.

Reply to tesseract08
tesseract08   06-06-2009 at 12:55:24 AM
- 0 +

I decided to exchange my i7 and CM V8 at my local electronics store and it seems to have paid off.

I'll run some more tests to get some solid results.

Reply to tesseract08
CompuTronix   06-06-2009 at 01:04:22 AM
- 0 +

I was wondering how you were progressing. I'll be standing by.

Reply to CompuTronix
tesseract08   06-07-2009 at 09:24:39 PM
- 0 +

Thanks for standing by. Here is what I have with a new core i7 and CM V8 installed.

Tjunction:
Core Min idle: 30C (Real Temp)
Cores Avg idle: 32C

Core Max load: 66C (Real Temp)
Core Avg load: 64C

Tcase:
5C less than Tjunction.


Ambient = 20C
Chipset = X58
CPU = i7 920
CPU Cooler= Coolermaster V8
Frequency = 3.6 Ghz
Speedstep/Turbo = Disabled
Load = Prime95 - Small FFT's - 10 minutes
Motherboard = Asus P6T
Stepping = D0 (CPUID)
Core Voltage = 1.192V (CPUID)

Closed case, Cooler Master HAF 932.

Reply to tesseract08
CompuTronix   06-08-2009 at 03:01:56 AM
- 0 +

Huge improvement! :D Good job. I think you've nailed it.

Reply to CompuTronix
tesseract08   06-08-2009 at 10:05:43 PM
- 0 +

Ok I just did some tests on these settings using Prime 95 for about 20 hours. Small FFT's. Stable.

This morning I started up my computer and got this for the first time.

Failed overclock on startup. Before Windows loads.

It gives me two options to go into BIOS or reset to defaults. I went into BIOS and didn't change anything. I just saved and exited. Windows started fine.

Is this a hiccup I should ignore? Since then it has started up fine.


Reply to tesseract08
CompuTronix   06-09-2009 at 01:28:15 AM
- 0 +

It's a common BIOS fallback, which typically occurs when startup or shitdown doesn't execute perfectly.


Message edited by CompuTronix on 06-09-2009 at 07:31:04 AM
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