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post #411 of 428
What is max package temp for Athlon x4 750K??
post #412 of 428
Quote:
Originally Posted by overbreaker View Post

What is max package temp for Athlon x4 750K??

The CPU starts to throttle around 75-80C, however your mobo may throttle earlier, depending on MOSFET temperatures and overload protection.
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post #413 of 428
My processor under stress reaches a core temperature of 46C but the stress is 86 C. It is overclocked to 4.300 GHz. It is stable even during long gaming sessions. But I'm worried about the core temperature in HW monitor or OCCT. Is the temperature of the package is not fatal for him ??
Edited by overbreaker - 10/19/15 at 12:15pm
post #414 of 428
Quote:
Originally Posted by overbreaker View Post

My processor under stress reaches a core temperature of 46C but the stress is 86 C. It is overclocked to 4.300 GHz. It is stable even during long gaming sessions. But I'm worried about the core temperature in HW monitor or OCCT. Is the temperature of the package is not fatal for him ??

You have big problems and are a MHz away from frying something. Please complete Rigbuilder at the top right of this page. Don't forget to include which CPU cooler you are using.
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post #415 of 428
Quote:
Originally Posted by wizardonthejob View Post

You have big problems and are a MHz away from frying something. Please complete Rigbuilder at the top right of this page. Don't forget to include which CPU cooler you are using.
Quote:
Originally Posted by overbreaker View Post

My processor under stress reaches a core temperature of 46C but the stress is 86 C. It is overclocked to 4.300 GHz. It is stable even during long gaming sessions. But I'm worried about the core temperature in HW monitor or OCCT. Is the temperature of the package is not fatal for him ??

No, it's fine, you're not taking the platform into account smile.gif FM2 is not AM3, FM2 is notorious for false core temp readings.

Look at CPUTIN, it is the socket sensor reading and is about the only correct reading on FM2.
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post #416 of 428
OK.Thanks guys.
post #417 of 428
Quote:
Originally Posted by ronnin426850 View Post


No, it's fine, you're not taking the platform into account smile.gif FM2 is not AM3, FM2 is notorious for false core temp readings.

Look at CPUTIN, it is the socket sensor reading and is about the only correct reading on FM2.

Would this apply to FM2+ platform as well?
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post #418 of 428
Quote:
Originally Posted by Solohuman View Post

Would this apply to FM2+ platform as well?

I still haven't tried the new 8xx series Athlons, but it has been so since FM1, I doubt they fixed it.
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post #419 of 428
The basic temperature measuring logic in AMD processors is pretty straight forward.
The tCTL control value (often dubbed as package temperature) is the a digital control value measured and calculated by the TCEN.
It is only intended to be used by the CPU power management itself. It is not a temperature in any scale (Celcius, Kelvin or Fahrenheit).

After 10h CPUs there is no longer a analog temperature sensor present in the die. Instead there is one or more digital sensors, which communicate through the two wire (I2C) interface. The digital signal from the CPU is connected to a environment controller (typically LPC/IO IC). The controller reads and decodes the output and writes it to it´s own registers, where hardware monitoring software can read it out. The controller may also adjust the fan header PWM output or voltage (i.e. fan or pump speed) depending on the temperature, if such function is desired.

Typically the environment controller is made either by ITE or Nuvoton (LPC/IO), depending on ODM and model of the motherboard.
The basic pricipal is always the same, however motherboard manufacturer may configure the controllers differently. The decoded temperature value from the CPU may usually be placed in any of the "Temperature Inputs / TMPIN" registers of the controller, so the location (TMPIN1-x) can vary between the motherboards.

This temperature is officially called as SB-TSI temperature, however many users call it as "socket temperature".
In reality socket temperature sensors seized to exist after the Socket 462 / A ERA. In modern PGA / BGA sockets it is technically impossible to include a NTC thermistor in the socket and the socket certainly doesn´t come with one by default. The motherboard manufacturers are free to implement an external NTC resistor to be placed adjacent to the socket, however it´s readout cannot replace the default values. In most modern motherboards the only external NTC sensor close to the socket is found in the VRM area (for OTP).

tCTL ("package ["temperature"]) == Internal control value
SB-TSI ("socket" [temperature]) == Digital output from the digital diode in the die

Figure 1. shows the configuration used on 10h and older CPUs, Figure 2. shows the configuration on newer CPUs.
SDA / SCL are the standard signals for I2C, SMBUS / PMBUS protocols.


Edited by The Stilt - 10/21/15 at 4:18am
post #420 of 428
Quote:
Originally Posted by The Stilt View Post

The basic temperature measuring logic in AMD processors is pretty straight forward.

tCTL ("package ["temperature"]) == Internal control value
SB-TSI ("socket" [temperature]) == Digital output from the digital diode in the die

This is a very interesting post, which actually shatters my beliefs, based exactly on socket A era. But i have one question. If the "socket temp" is coming from the die, how is it that different motherboards give wildly different temps for the same conditions? I mean, for example, all Asrocks seem to skyrocket in socket temp. I 've seen plain 10C difference between Gigabyte and Asrock, all other same, same voltage, same clock. It can't be that there is such a big configuration error that gives 10C difference, from the DIGITAL output no less!
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