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Phenom II X4 955 (Cpu temp v. core temp) - Page 2

post #11 of 49
Quote:
Originally Posted by pengs;12234825 
Last post:
"spoke with AMD rep today and the guy told me that when AMD states the max temps on a cpu, they mean the "cpu temp" and not the "core temp"..core temps are supposed to be hotter due to the fact that they are located on the hottest part of the cpu..My phenom II 965 maxes "cpu temp" 50c and "core temp" of 55-57c.
So, when AMD says the max temp is 62c..they mean for the CPU Temp (over all temp) not the cores"

There's a lot of hear say over the subject but I'd expect and always suspected that this guy is probably right as the CPU temp is also the one listed in the bios. It would be a little odd for AMD to say "CPU max = 62c" and meaning CPU core, whilst most motherboards giving the wrong temperature.
I can guarantee he's right:

http://support.amd.com/us/Processor_TechDocs/43375.pdf

Notice for the C3 CPUs it says "Tcase Max". That's what the CPU Temp is.
post #12 of 49
Wait so as my core temp is maxing at 55 on intel burn and cpu is maxing at 49 I have 6 or so degrees of headroom? If thats the case time to go to 1.6 and have some fun while I'm snowed in! devil.gif
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post #13 of 49
Quote:
Originally Posted by CRosko42;12234970 
Wait so as my core temp is maxing at 55 on intel burn and cpu is maxing at 49 I have 6 or so degrees of headroom? If thats the case time to go to 1.6 and have some fun while I'm snowed in! devil.gif
Yeah but don't go crazy with it.
post #14 of 49
Quote:
Originally Posted by lonewolf371;12235013 
Yeah but don't go crazy with it.

Awesome...time to shoot for 4.5.
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post #15 of 49
Quote:
Originally Posted by CRosko42;12235065 
Awesome...time to shoot for 4.5.
Also most people usually say to keep it at 50C or below. I wouldn't push it to 55C, and with the Phenom II chips that extra heat can actually create more instability than you're getting stability out of voltage. Be sensible about it is all I'm saying. My last $0.02.
post #16 of 49
Thread Starter 
This is so freaking weird. Under load, my core temp is AT LEAST 20c higher than my CPU temp. My 'puter crashes anytime the core temp is between 64-70c, even though the CPU temp stays at about 50c. Do you think my CPU temp sensor is bad?

What kind of CPU-NB voltage do you think I need for 2700Mhz?

Does 1.44v seem right for a 4.0Ghz overclock?
    
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post #17 of 49
Quote:
Originally Posted by CRosko42;12235065 
Awesome...time to shoot for 4.5.

If you are attempting a one time only death-run, then by all means go for it. You definitely dont want to use that 24x7, right?
Anyway, if you are stable at 4ghz with 1.44v, I dont see any reason to go beyound that. Frankly, you will notice extra performance benefits if you decide to push the cpu-nb clock beyond stock.
    
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post #18 of 49
you should be able to hit 2700+mhz at cpu-nb with 1.3-1.35v
    
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post #19 of 49
Thread Starter 
Little background to my problem...I *was* stable at 4.0Ghz with 1.44v. My CPU temp reached 50C (core reached 63c) after an hour of OCCT. I moved on to oveclocking the NB. I read some research that said 2600-2700Mhz would pair nicely with 4ghz. I can't get this thing stable, and I've tried everything from 1.25-1.45v on the CPU-NB. CPU temps tops out at 50c, but the cores hit from 64-70c in about a minute. Seems like most people can get away with 1.3-1.4v on the CPU-NB.

Is the NB overclock throwing everything off? Might I need just more vcore on the CPU itself?
    
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post #20 of 49
At higher speed, its better not to rely on the core temperatures. There is only one heat sensor in phenom2 cpus and the core temps are deducted from that sensor read and the tjmax value. That is why different software will give you different coretemp.
Anyway, at any warm environment its pretty much sure that the 955be c3 will hit 70c at 4Ghz on full load. So, to run this cpu at that clock speed or above, you will need powerful cooling solutions. I think I saw that you are using the hyper212+ (not sure if its you or someone else on some other thread), hyper212+ is a very good cooler but is not enough for OCed 3.9GHz+ systems.
To comment on the stability, however I shall have to know which error Prime95 gives you. Different issues generate diff errors. To pinpoint it (cpu or ram or ?) I gotta know that. So please run p95 in blend mode and post the error name/code here.
    
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