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post #6681 of 8112
Quote:
Originally Posted by Raephen View Post

Uhmm.... The core temp? That's the place where AMD HASN'T got a temperature sensor - it's an algoritm based on, I'd guess, load + Vcore and speed.

Take off your CPU cooler and tell me what it reads. I bet it will be a little higher (just a little bit tongue.gif), and non of those variables changed.
post #6682 of 8112
Quote:
Originally Posted by KyadCK View Post

Agreed. It has come from AMD to watch Core temps, so I'm not even sure why this is up for discussion at all.
This is akin to AMD coming out and telling everyone the exact design of the modules, yet people come up with different way it could possibly work anyway.

And u realy think thatt 8 core CPU clocked at nearly 5.0Ghz @1.5V is getting to just 60C on full load ???? That is just ridiculous mate.

P.S. I was thinking about air cooling, or average water coolers like H80 or even H100.
Edited by itomic - 11/25/12 at 3:20pm
post #6683 of 8112
Quote:
Originally Posted by itomic View Post

And u realy think thatt 8 core CPU clocked at nearly 5.0Ghz @1.5V is getting to just 60C on full load ???? That is just ridiculous mate.

Why is that?

I could send you a link to a Vishera chip at -250C running 2v for 8.3GHz. Of course it is cooled by liquid nitrogen, but that's beside the point. You don't know how hot it's going to be just based on frequency/voltage/corecount. Cooling matters too.
post #6684 of 8112
Quote:
Why is that?

I could send you a link to a Vishera chip at -250C running 2v for 8.3GHz. Of course it is cooled by liquid nitrogen, but that's beside the point. You don't know how hot it's going to be just based on frequency/voltage/corecount. Cooling matters too.

pretty much this.

My 8120 doesn't hit 60c at 1.5 volts, and i'm on a antec 920 with delta fans. I actually never go over 50c. Though at 1.5 volts@ 5ghz those deltas get amazingly loud. I run at at 4.9ghz and 1.45 volts daily, much more manageable on the ears.

tor those wondering they are the Delta 120 x 38mm Ultra High-Speed Fan - 210.38 CFM fans 64db fans. Thankfully they are hooked into my antec 920 for voltage control (grabs its power from the usb)
Edited by ebduncan - 11/25/12 at 3:32pm
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post #6685 of 8112
Quote:
Originally Posted by KyadCK View Post

62C Core is 62C actual. The formula is only accurate the closer you get to 60, temps as low as ambient will be considerably off.
........ Please read what I bolded, then think about it for a minute. Does that even remotely make sense to you? How could AMD possibly be able to know enough about every CPU at all Voltages, speeds, and cooling to guess that?

Core temps are, as I like to call them, guesstimates. Mathimatical formulas based around load / voltage and perhaps speed.

Please, feel free to correct me if I'm wrong, but as far as I know there is no physical sensor on die / in the chip to monitor the temperature it's running at.
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post #6686 of 8112
If I take off my cooler it'll boot, run a bit, and then turn itself off. Thank god for that protection wink.gif
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post #6687 of 8112
Quote:
Originally Posted by Raephen View Post

If I take off my cooler it'll boot, run a bit, and then turn itself off. Thank god for that protection wink.gif

My point is that if it is based around the "load / voltage and perhaps speed" as you suggest, then when you take off the cooler, the temp readings will not change. Why? Because load, voltage, and speed have not changed.

Therefor, it would never thermally throttle as it would assume it's at 60C and would turn into a miniature black hole as it overheated infinitely.
post #6688 of 8112
Quote:
Originally Posted by m0bius View Post

Take off your CPU cooler and tell me what it reads. I bet it will be a little higher (just a little bit tongue.gif), and non of those variables changed.

It'll boot, run for a bit and shut itself down. Thank god for that protection!

I just pointed out what I believe to be the case, and that is that AMD chips have nothing in the chip to report the temperature, so, logically, they must do it a different way.

All my fiddling with AMD chips - their clocks and voltages - and the neat fact that the moment you end a stress test, core temps seem to plummet, leaves me to believe the chip 'calculates' it core temperature.

But hey: I'm here to learn and sometimes give my own opinion.

PS - One thing does change: the thermal footprint of the chip hasn't got a good place to go but it's surrounding air and mobo real-estate and heats up the socket temperature up even faster than holding it close to a fire wink.gif
Edited by Raephen - 11/25/12 at 6:53pm
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post #6689 of 8112
Quote:
Originally Posted by m0bius View Post

My point is that if it is based around the "load / voltage and perhaps speed" as you suggest, then when you take off the cooler, the temp readings will not change. Why? Because load, voltage, and speed have not changed.
Therefor, it would never thermally throttle as it would assume it's at 60C and would turn into a miniature black hole as it overheated infinitely.

A valid point.

But lacking sensors, how then do they do it?
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post #6690 of 8112
Quote:
Originally Posted by Raephen View Post

It'll boot, run for a bit and shut itself down. Thank god for that protection!
I just pointed out what I believe to be the case, and that is that AMD chips have nothing in the chip to report the temperature, so, logically, they must do it a different way.
All my fiddling with AMD chips - their clocks and voltages - and the neat fact that the moment you end a stress test, core temps seem to plummet, leaves me to believe the chip 'calculates' it core temperature.
But hey: I'm here to learn and sometimes give my own opinion.
PS - One thing does change: the thermal footprint of the chip hasn't got a good place to go but it's surrounding air and mobo real-estate and heats up the socket temperature up even faster than holding it close to a fire wink.gif

You misunderstand me, there is an algorithm to it, that IS correct, but it doesn't work like you suggest.

If I had to guess I would say that maybe it measures the amount of time it takes to transmit a signal from 1 transistor to another, and the time it takes to do this changes depending on heat.
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