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Clarification on Maximum Temperatures for the FX series CPU's

post #1 of 5
Thread Starter 
While trying to find out what temperature reading, wether TCase or core temps, is related to the maximum safe operating temperature for my FX6100 (stated at 70C max) I emailed AMD tech support and received the following response:





From: TECH.SUPPORT@AMD.COM

Sent: Mon 5/07/12 1:24 PM

To: xxxxxxxxxxxxxxx@hotmail.com


We've added this sender to your safe list. That way you can always see what they've sent you.


Dear Stephen,

Your service request : SR #{ticketno:[8200488157]} has been reviewed and updated.

Response and Service Request History:

I understand that you are looking for clarity about the 70c maximum operating temperature of the FX-6100 and which specific temperature it references at that point. If this is incorrect, please let me know as the information provided may change.

The maximum operating temperatures for any AMD CPU is measured as TCase, as we find that the actual temperature measured by a thermistor inside the processor is a much more accurate measurement of the processor's temperature. While TJunction is helpful in determining the temperature of the actual pins that are transmitting the data, the fact that every pin doesn't fire at exactly the same time, the results can be somewhat skewed. While we don't have the tech docs up for the FX series yet in terms of max temperatures, you can see that we post TCase maximum temperatures on our Athlon/Sempron/Phenom processor Tech Docs at http://support.amd.com/us/Processor_TechDocs/43375.pdf , instead of using TJunction/TJ/TCore/etc.

As for Tctl, there is a technical definition at http://support.amd.com/us/Processor_TechDocs/41256.pdf on page 73 that (tries to) explain it. As a very crude Cole's Notes version, it doesn't measure temperature as much as it is a sliding scale that refers to the processor's current temperature as it relates to the temperature at which the cooling fan has to get to 100% to hit the maximum case temperature (TCaseMax). Confusing I know, but it allows the system to see how close it is to hitting 100% and subsequently it has to start slowing things down to get the temperature down. It is usually close to Tcase Max, but is more a point of reference for how close it is getting to Tcase Max, or if it is past that point and by how much. Things run normally at Tctl < TCaseMax - 0.125, and when it hits TCaseMax or higher, then things start getting shut down/slowed down/etc to get the temperature down. I hope that makes some semblance of sense, as it took a bit to wrap my head around it.

We appreciate your loyalty to AMD as we continue to strive for the best products in terms of graphics and processors for our customers. I am glad to hear that you are enjoying your FX 6100, and hope that the joy will continue for years to come. If you have any other questions or comments, please don't hesitate to reply directly to this email and I will try to provide any additional information that you may require.

In order to update this service request, please respond, leaving the service request reference intact.

Best regards,

AMD Global Customer Care

_____________________________________________________________________________________________

This email is a direct result of your contact with AMD Global Customer Care and not part of a campaign. There is no need to unsubscribe to this email as you will only be contacted again if you directly request another service from AMD Global Customer Care.

The contents of this message are provided for informational purposes only. AMD makes no representation or warranties with respect to the accuracy of the contents of the information provided, and reserves the right to change such information at any time, with or without notice.

_____________________________________________________________________________________________
    
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CPUMotherboardGraphicsRAM
FX-6100 Asrock 990FX Professional Fatal1ty XFX Radeon HD 5870 G.SKILL Sniper Series 8GB (2x4GB) 
Hard DriveHard DriveOptical DriveOptical Drive
Adata S510 Western Digital WD1001FALS Samsung SH-S183L DVD Writer LiteOn iHAS 124 DVD Writer 
Optical DriveCoolingOSMonitor
Optiarc BC-5500A BD-ROM/DVD Writer  Frankenstein H40/H50 (modified closed loop) Windows 7 Home Premium LG W2043 20" LCD 
MonitorPowerCaseMouse
Sharp Aquos 52" LCD 1080p Rosewill Hive Series HIVE-650 650W Modular Powe... CoolerMaster HAF 922 Gigabyte GM-M7700 
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post #2 of 5
nice to see you get a straight answer?
    
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post #3 of 5
Im a retard and still a noob. I cant read and comprehend good at all. I have a handicap.

So im still wondering if its the cpu overall temp that isnt safe to reach 70 or is it the core temps?
Brandon
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Brandon
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post #4 of 5
Quote:
Originally Posted by bburrill2012 View Post

Im a retard and still a noob. I cant read and comprehend good at all. I have a handicap.
So im still wondering if its the cpu overall temp that isnt safe to reach 70 or is it the core temps?

Core Temps are all that counts. "CPU" temp is measured at the base of the CPU socket and typically runs +10C over the core temps - but this is not of significance.
Edited by AMD4ME - 6/23/12 at 6:54pm
post #5 of 5
Dear Brandon,

Your service request : SR #{ticketno:[8200495461]} has been reviewed and updated.

Response and Service Request History:

Sorry you are correct and I missed that part of the question; however the 70c degrees temperature is our measurement for the entire processor not per core.






So why does amd say otherwise when I asked them?
Brandon
(16 items)
 
  
CPUMotherboardGraphicsRAM
AMD FX-6100 ASRock 990FX Professional Fatal1ty P1.80 EVGA Geforce GTX 560 Ti Fermi Classified 2 X 4GB GSkill Ares 1866mhz 
Hard DriveHard DriveOptical DriveCooling
Corsair Force GT 90Gb Sata 3 6.0Gb/s WD RE4 500GB Sata 2 3.0Gb/s Asus DVD-RW Xigmatek Aegir w/ XAF-F1255 
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Brandon
(16 items)
 
  
CPUMotherboardGraphicsRAM
AMD FX-6100 ASRock 990FX Professional Fatal1ty P1.80 EVGA Geforce GTX 560 Ti Fermi Classified 2 X 4GB GSkill Ares 1866mhz 
Hard DriveHard DriveOptical DriveCooling
Corsair Force GT 90Gb Sata 3 6.0Gb/s WD RE4 500GB Sata 2 3.0Gb/s Asus DVD-RW Xigmatek Aegir w/ XAF-F1255 
OSMonitorKeyboardPower
Windows 7 64-Bit 20" Acer 1080P LED 1600x900 Microsoft Wireless Comfort 4000 Thermaltake TR2 RX 750W Bronze 
CaseMouseMouse PadAudio
Homemade Test Bench Microsoft Wireless Laser 5000 Freedom Forever US Air Force Headphones or harmon/kardon w/ sub 
  hide details  
Reply
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