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Strange temp readings in CoreTemp

post #1 of 12
Thread Starter 
Ok, first off I'm new here, and also to overclocking, so bear with me biggrin.gif.

I was just messing around with overclocking my X4 970 BE to 4.1ghz. After changing around the settings in the BIOS, I ran prime95 blend test for 45 minutes and all went fine and it never went above 50c (heat sink is a CM hyper 212+ with AS5). I then rebooted into BIOS and upped the CPU frequency by 1 (to 213mhz) and rebooted. This time temps skyrocketed up to around 60c and the test failed.
I went back and changed the setting back to 212mhzand retested, this time temps went up to 62c before I stopped the test.

My question is, what would cause one test to go perfectly fine with low temps for 45 minutes, and another test, only minutes later, (with the same settings) to get crazy temps within 1 minute? FWIW, my idle temps are around 38c. Also, I felt the top of the plate that makes contact with the CPU during the test when it was at 61c and it was only slightly warm.
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post #2 of 12
Are you sure the first test was actually running okay? There's definitely been times where I was running p95 and getting great temps, then noticing 30 minutes later that one of the threads had actually been off the whole time.

Are you sure the CPU cooler is mounted okay? (You didn't drop the case or anything between tests lol)

Also are you running the CPU fan speed on Auto or at full speed? And what voltage are you at?
     
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post #3 of 12
sometimes i get flakey readouts when i OC my rig due to some anomoly in the bios. Mark all your changes then "reset to factory settings" and redo it. You will have a non-jumbled OC that way.

Other than that, couldnt tell you.
post #4 of 12
It is well known by now that coretemp gives inconsistent readings. You should try using a different temp monitor software maybe????? That might be a good idea. Something like HW monitor works a lot better.
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post #5 of 12
Thread Starter 
These are the results from Prime for the 3 tests I ran.

This is where I let it run for 2 tests. All 4 threads were running and all cores were 100%. Never hit above 50c. The cpu fan is on auto.
[Mon Feb 06 18:33:06 2012]
Self-test 1024K passed!
Self-test 1024K passed!
Self-test 1024K passed!
Self-test 1024K passed!
[Mon Feb 06 18:48:27 2012]
Self-test 8K passed!
Self-test 8K passed!
Self-test 8K passed!
Self-test 8K passed!

And this is after I bumped the CPU Frequency by 1mhz
[Mon Feb 06 18:52:37 2012]
FATAL ERROR: Rounding was 0.5, expected less than 0.4
Hardware failure detected, consult stress.txt file.

There are no results for the tests from when I lowered the Freq back down because I stopped the test because of the temps.
The PC wasn't moved between tests, so the cooler didn't get shifted or anything. With the temps reading at 62c, the air coming out of the cooler was cool and the heat sink base was only slightly warm. the fins and heat pipes were cool.

My settings are:
CPU = 4133mhz
Multiplier = x19.5
NB = (x10) 2120mhz
CPU Freq = 212mhz
HT link = 2120mhz
CPU volt = 1.4500v (wasn't stable above 4ghz at stock voltage)
CPU NB volt = 1.1250v
Edited by drummr91 - 2/6/12 at 6:24pm
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post #6 of 12
Quote:
Originally Posted by mikezachlowe2004 View Post

It is well known by now that coretemp gives inconsistent readings. You should try using a different temp monitor software maybe????? That might be a good idea. Something like HW monitor works a lot better.

Yeah definitely try HWMonitor and see if that gives you more consistent temps (link)

If you really are running in the 60s you'll want to back down the voltage and freq., at least until you get a beefier heatsink
     
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post #7 of 12
Thread Starter 
Quote:
Originally Posted by AgentHydra View Post

Yeah definitely try HWMonitor and see if that gives you more consistent temps (link)
If you really are running in the 60s you'll want to back down the voltage and freq., at least until you get a beefier heatsink

I just tried HWMonitor and it's getting the same readings. I know that above 62 is bad, which is why I stop the test before it gets above 62. I'm beginning to think that the temps are wrong. When I start a test it goes from 35c to 48c instantly and then slowly climbs to 60+. Is that normal? Shouldn't the heat pipes or the plate that touches the CPU be hot at 60c? Either way, i'll back down the OC a bit. Just seems strange that during the first 2 tests the cpu fan didn't even spin up much. So even the mobo was reading ~50c
Edited by drummr91 - 2/6/12 at 6:51pm
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post #8 of 12
Quote:
Originally Posted by drummr91 View Post

I just tried HWMonitor and it's getting the same readings. I know that above 62 is bad, which is why I stop the test before it gets above 62. I'm beginning to think that the temps are wrong. When I start a test it goes from 35c to 48c instantly and then slowly climbs to 60+. Is that normal? Shouldn't the heat pipes or the plate that touches the CPU be hot at 60c? Either way, i'll back down the OC a bit. Just seems strange that during the first 2 tests the cpu fan didn't even spin up much. So even the mobo was reading ~50c

Considering the frequency, volts and heatsink you're running those temps sound about right to me, but then again I use HWMonitor too lol.

Of course you could just ignore the temps and just go for stability, up to you.
     
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post #9 of 12
Thread Starter 
Quote:
Originally Posted by AgentHydra View Post

Considering the frequency, volts and heatsink you're running those temps sound about right to me, but then again I use HWMonitor too lol.
Of course you could just ignore the temps and just go for stability, up to you.

Haha it wouldn't be very smart to ignore the temps. Do you have any recommendation on a better CPU cooler?
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post #10 of 12
Quote:
Originally Posted by drummr91 View Post

Haha it wouldn't be very smart to ignore the temps. Do you have any recommendation on a better CPU cooler?

Well if you think the temps are wrong they aren't really that helpful are they? My Athlon II 250 had dead temp sensors, idled below ambient room temp and maxed out at like 25C. I just clocked it as high as it would go without p95 crashing, worked out fine.

Personally I would go with a NZXT Havik 140, but if you have the extra money the TR Silver Arrow and NH-D14 are pretty much the best air coolers you can get. H100 might be worth looking into as well.
     
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