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AMD Reps Official Answer To AMD CPU Temperatures. - Page 2

post #11 of 30
Quote:
Originally Posted by rrohbeck View Post

Why would anybody take the answer from a support rep seriously who doesn't even explain about CPU case vs core temp (Tctl)?
"we like to see temperature readings for your CPU around 30-50 C. The official max is somewhere around 75-80 C depending"
Huh???
Translation: "I don't know either but somebody dropped this support request in my lap. Here's some blah blah so I can close the ticket."
There are data sheets that explain the limits exactly. The only problem is that they haven't been updated for Bulldozer or at least not published on the Web (shame on you AMD.)
But somebody at AMD said (dunno if officially or unofficially) that the K15 thermal implementation is exactly the same as K10 and the Linux kernel uses exactly the same code as K10 for K15.


because in laymen's terms, it doesn't really matter. everyone acknowledges that electronic devices (CPUs) have a few degrees of variation and yet most OCNers are still regurgitating rigid manufacturer guidelines in threads. If it runs stable 24/7 then it's freakin "safe" to run 24/7.
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post #12 of 30
Quote:
Originally Posted by Petrol View Post

because in laymen's terms, it doesn't really matter. everyone acknowledges that electronic devices (CPUs) have a few degrees of variation and yet most OCNers are still regurgitating rigid manufacturer guidelines in threads. If it runs stable 24/7 then it's freakin "safe" to run 24/7.

EXACTLY !!! thumb.gif
Edited by AMD4ME - 2/21/12 at 7:38pm
post #13 of 30
Yup. It's not like you need ample headroom like an OEM who has to cope with cheap power supplies/fans, hair balls, ridiculous environmental temperatures and, most of all, cheap stock coolers.
There's lots of margin.
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post #14 of 30
I've had FX cpus not become unstable in prime up to 80c, seems they have much higher tolerance. They also don't seem to throttle at any temperature, they just shutdown at 90c core temperature. 61c for the 8 core versions seems extremely conservative and likely just a huge safety net.

My 960T becomes unstable at around 60c though.
post #15 of 30
From what I have seen the FX CPUs do seem to have a higher thermal limit before errors than the Phenom II series which typically needed to be under 60C.
post #16 of 30
Thread Starter 
True, the FX's generally have a limit at 71c according to their documentation.
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post #17 of 30
Quote:
Originally Posted by Imprezzion View Post

True, the FX's generally have a limit at 71c according to their documentation.

It depends... Some FX CPUs have an official 61C Max 24/7, like the 8xxx series. What I meant was the FX CPUs seem to be able to run at a higher temp without errors compared to the Phenom II series.

http://products.amd.com/en-us/DesktopCPUDetail.aspx?id=770&f1=&f2=&f3=&f4=&f5=&f6=&f7=&f8=&f9=&f10=&f11=&f12=
post #18 of 30
Yeah, it doesn't really explain anything. I've read about 4 reports from AMD reps, most of them do emphasize t-case but some of them focus on core. To make it even worse, some people (like me) have a t-case temperature that is less than the core estimate while other people claim their core temps are lower than t-case rolleyes.gif.

I've always kept an eye on the t-case temps. My 955 seemed to become unstable after 62-64c. The core temps are also non physical, they are algorithm based but apparently have dictation on some throttling. My thought is that depending upon what cooler you have and how much pressure is put on the CPU, you should look at the t-case temperatures to find where your particular setup becomes unstable.

Now just try telling this guy that he is reading t-case when he thinks they are core. The confusion is endless because AMD engineers can develop a CPU architecture but apparently can't figure out how to send an email (or aren't allowed to).
Edited by pengs - 2/23/12 at 9:41am
post #19 of 30
My core temp seems to be way off 18 C right now but cpu temp is at 30 C so i just use the cpu temp as my max's but core temp reacts to load/temp changes so much faster???
which one is more accurare??? confused.gif

Edit- entered wrong cpu temp!!!!
Edited by scottdog7000 - 2/23/12 at 9:44am
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post #20 of 30
^^^^ AMD Tech Support is NOT AMD Engineering. wink.gif Many if not most companies do not allow their engineers to actively participate with end users in an official capacity on enthusiasts forums.

AMD Tech Support is very disappointing IME and appears to be just reading from a PC screen some place far, far away - perhaps in India? redface.gif
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