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Is My CPU throttling?

post #1 of 9
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Well I have a Q6600 G0 that I bought a few weeks ago at fry's. I have read that the new quads don't o/c as well as the older ones and I'm thinking this is true, or my MB is crap.

Batch number is L745B154 and vid is 1.2875v

Well all attempts at 3.6ghz have been unsuccessful, I can boot but nothing can get me even close to stable. Bios settings are 1.6v which translates to over 1.5v. So I pretty much gave up on 3.6ghz and started working at 3.5ghz where I started to run into problems.

I still need a good amount of vcore to run 3.5ghz+ but what happens is that the temp on cores 1&4 start rising and reach about 68°c where they then suddenly drop to around 59-60°c and the entire time cores 2&3 were at around 63-64°C. Load temps vary by 4-5° between the two groups. Even after the temp drops, prime keeps running for a bit, but I stopped it because I'm not sure if something is wrong.

An unusual thing is that around 3.2 - 3.4ghz cores 1&2 are the ones with higher temps.
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post #2 of 9
The thermal limit is 71C, so stay under there and you should be fine!
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post #3 of 9
That is very common. Your CPU will not throttle until 95C-100C I believe. It is much higher than what you are running it at. It is generally advisable to stay withing 20-30C of TJ max, regardless of the application you are using tio measure temps.

My Q6600, for example, has 2 core that load up to 60C while the other 2 stay below 55C. Some tests in prime95 and OCCT will yield higher temps than other, thats why it was higher and then dropped bown again. if you use OCCT and look at the temp graph after the test finishes, you will see a fluccuating temp throughout.

Quote:
Originally Posted by AMD+nVidia View Post
The thermal limit is 71C, so stay under there and you should be fine!
keep in mind, thst is the temp Intel requires you to stay under to keep it within warranty specifications. The throttling temp is much higher. Since none of the temp applications are 100 accurate, it is best to stay withing a certain delta of max as oposed to a certain temp. For example: Coretemp 0.97.1 would show a TJ max of 100C while real temp will show a max of 95C. If you run them both at the same time, the temps reflected by said programs will be different by 5C. Since Intel CPU's reflect the core temp based off of TJ max, this makes perfect sense. But, as you can see, the actual temps read are different by 5C. That means, it would be shown as running 5C hotter if you used real temp as oposed to core temp.

If you use delta to TJ max, you stay the same regardless since all you care about is how far from the limit you are.
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post #4 of 9
Did you try raising the nb and fsb volts. Where do you have it now.
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post #5 of 9
Quote:
Originally Posted by Danbeme32 View Post
Did you try raising the nb and fsb volts. Where do you have it now.
He may need to raise them to 0.2+, but I ran a DS3L at 440 FSB and it was fine at 0.2+. Granted, it is a quad and it doesn't hurt to try. I have a newer G0 and I can get stable at 3.6, but it takes 1.488 vcore. I have yet to get 3.7 stable, though.

Also, make sure your RAM is underclocked so as not to efect stability.
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post #6 of 9
Thread Starter 
Well in order to boot at 400fsb with the quad I need the NB at +3 and FSB +1. Anything less and it freezes while windows is attempting to load. I tried this with both an 8x and 9x multi and in both cases I need +3 Nb. I used an E2180 for a week or so and an E6600 and both only needed +1 when I was at 400fsb and anything less didn't require to add any voltage at all.

With the NB and FSBv raised I can boot with 1.45v @ 3.6ghz but it's just as unstable as when I set the vcore to 1.6v. Anything in between doesn't make it any more stable either.

My ram is always underclocked except when I try 3.6ghz. I almost always have it running 1:1 and I always use 9x multi. I ran memtest overnight at 400fsb w/ 4-4-4-12 timings and no errors were found. I did it using a different divider and I don't know if it would be any different than if I had the cpu o/c higher. The ram is still running at the same speed but I don't know if it would be affected by cpu speed. I even tried loosening the timing when trying to o/c passed 3.5ghz but it didn't help.

Back to the original question, so your saying it's normal for the temp to just drop all of a sudden? Using core temp 96.1 the temp never reached 70°c, it dropped down at around 68°c which seems odd to me. It has never done this at any of the lower speeds just at 3.5ghz+.
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post #7 of 9
Quote:
Originally Posted by AMD+nVidia View Post
The thermal limit is 71C, so stay under there and you should be fine!
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post #8 of 9
Quote:
Originally Posted by Mikecdm View Post
Well in order to boot at 400fsb with the quad I need the NB at +3 and FSB +1. Anything less and it freezes while windows is attempting to load. I tried this with both an 8x and 9x multi and in both cases I need +3 Nb. I used an E2180 for a week or so and an E6600 and both only needed +1 when I was at 400fsb and anything less didn't require to add any voltage at all.

With the NB and FSBv raised I can boot with 1.45v @ 3.6ghz but it's just as unstable as when I set the vcore to 1.6v. Anything in between doesn't make it any more stable either.

My ram is always underclocked except when I try 3.6ghz. I almost always have it running 1:1 and I always use 9x multi. I ran memtest overnight at 400fsb w/ 4-4-4-12 timings and no errors were found. I did it using a different divider and I don't know if it would be any different than if I had the cpu o/c higher. The ram is still running at the same speed but I don't know if it would be affected by cpu speed. I even tried loosening the timing when trying to o/c passed 3.5ghz but it didn't help.

Back to the original question, so your saying it's normal for the temp to just drop all of a sudden? Using core temp 96.1 the temp never reached 70°c, it dropped down at around 68°c which seems odd to me. It has never done this at any of the lower speeds just at 3.5ghz+.

I would get the latest version of coretemp (0.97.1) Yes, when the stress test is running, it is not ocnsistantly stressing the cores to the same level all the time. These fluccuations, along with normal fluccuations caused by the hardware, will in turn yield different variations in temp. I don't recall a CPU (AMD or Intel) that didn't fluccuate slightly when stressed. Some more than others and some programs reflect this more than others.

For instance, I am trying to get my quad stable at 3700. I raised the vcore up to about 1.552v in BIOS. When I run OCCT, it starts off at 67C-68C according to coretemp 0.97.1. After 3 minutes or so, it spikes to 74C-75C. After a minute of so, it drops back down again. All that means is that whatever stress test that si specificly being run is taxing that particular core (or all of them) a little more than the last test did.


This is what they look like when you use OCCT:
http://www.ocbase.com/perestroika_en...s/GraphOff.png

I assume prime95 would show similar results if they offered a graph.
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post #9 of 9
Thread Starter 
thanks, that makes sense. It just seemed strange since it wasn't the typical fluctuation that I'm used to. Usually it goes up and down for quick seconds. What has been happening to me lately is a 8-9° drop and then it stays there for several minutes until it shoots back up to where it was.
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