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AMD Phenom II 5xx-10xx - Temp & Monitoring Guide

post #1 of 8
Thread Starter 
I'm writing this so people can be direct to it when questions arise about this very topic!

Just about every day or so I see people posting, asking whether they should be worried about core temperatures, or the CPU temperatures, or both. To set this straight and have the definitive answer for everyone to read and know, here it is:

If you own a Phenom II chip, in any of the families, 5xx, 7xx, 8xx, 9xx, or 10xx, you'll know there's been issues with each ranging from IMC problems on earlier C2 chips to inaccurate sensors on others. Although this guide applies to all of the families it is more prominent with the Thuban series (10xx) chips.

The sensors have never been fantastic by AMD in any sense, but as of late there are known issues with the Thuban series and the dramatic difference in core temps, where some were even reading at temperatures below ambient. This is due to a faulty core temperature sensor. Some chips are reading 10c or more below the CPU temperature being reported and others are reporting more closely to the CPU temperature.

If you're wondering which temperature you need to worry about and monitor, it is the CPU temperature. The core temperatures are not accurate representations of how hot your chip is getting. Below is a list of AMD maximum temperatures:

If you own:

5xx - 80w version - Max temp: 70c
7xx - 95W version - Max temp: 73c
7xx - 65w version - Max temp: 72c
8xx - 95w version - Max temp: 71c
9xx - 140w version - Max temp: 62c
9xx - 125w version - Max temp: 62c
9xx - 65w version - Max temp: 70c (910e - 71c)
10xx - 125w version - Max temp: 62c
10xx - 95w version - Max temp: 71c

Now, these are the max temperatures for your given chip defined by it's version and rated by wattage. There are other chips, OEM chips (some already included in the list above) and others, but they all are in the same ballpark temperature-wise. Most of us here (OCN) will be on the 9xx series 125w, 10xx 125w/95w, and 7xx-8xx series (namely 720's and 810's).

There are a few things things to note:

* If you bought a 5xx or 7xx chip and were able to successfully unlock it, you'll notice your core temperatures will report as 0c or other erroneous numbers (the previous is more likely). The CPU temperature on these is still applicable and should still be considered accurate.

* If you bought a 8xx or 9xx chip the sensors are still inaccurate. Always go by the CPU temp for accurate readings.

* If you bought a 1055T/1090T, know that some chips have better core temp sensors than others, but they're all inaccurate. It is always the CPU temperature that you need to be concerned with.

* You can have motherboards that misread the temperatures as well. Without listing a lot of them, one in specific comes to mind, the Biostar TA890FXE. Just be aware of what others are reporting who have the same motherboard as you so you'll have reference if you think your board is reporting incorrectly.

How to monitor:

To monitor your temperatures you can use HWMonitor, Everest, AMD Overdrive, and a plethora of other temperature/voltage monitoring programs. However, many are not accurate with AMD. The most often and best suggested of all monitoring programs are HWMonitor and Everest. Many manufacturers will also include proprietary programs to monitor temperatures also, which I suggest you use as well; such as ASUS' PC Probe II (and other variants). They will generally work properly and report correctly, with the proper labels given to each temperature.

About HWMonitor -

A lot of people have issues with HWMonitor because they aren't sure which TEMPIN0/1/2 are their CPU, NB, Motherboard, or maybe even SB if it's being reported. The reason for this is that HWMonitor does not list each component (CPU, NB, SB) in the same way for each motherboard.

Example:
An ASUS board may report as:

TEMPIN0 = CPU
TEMPIN1 = Motherboard/NB
TEMPIN2 = Erroneous reading

An MSI board may report as:

TEMPIN0 = Motherboard/NB
TEMPIN1 = CPU
TEMPIn2 = SB / Erroneous reading

This is where a lot of people get confused and understandably. Some motherboards, such as the ASUS Crosshair IV will actually label the temperatures for each specific component of the board, and HWMonitor may even show this with the correct labels. If your board does not, however, there are two things you should do to know what temperature is what.

#1 Compare temperatures under load (Prime95) to each other using multiple monitoring programs so you know exactly which temperature is which in HWMonitor.

#2 If you are only getting two temperatures reported (even if a third is, but is erroneous) it is safe to assume that your NB temperatures (important for those who are overclocking via the HTT) is also reported as your 'Motherboard' temperature. They are likely one-in-the-same when reported.


Overclocking:

When you overclock your chip it is important to know that there are some voltages and temperatures that are normally considered to be 'the wall' when it comes to certain chips. There are many guides that already go over this so I'll keep this short. For the 8xx through 10xx chips (disregarding the 5xx-7xx, though it can still apply if they are unlocked and operating as quads) the heat wall happens at or slightly above 55c @ 1.55v. With less voltage your wall might be a little higher and is why some chips don't automatically shut down even when they go over recommended temperatures (say 62c max for a 955, in example). Keep this in mind when overclocking, it is important to monitor.

I hope this guide is helpful for those with AMD Phenom II chips and hopefully anyone with questions about this very topic can be directed to this. If there are mistakes or additions to be added, please let me know. Thanks for reading!
    
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post #2 of 8
Any doubts about what your CPU can handle for temps see this page...

AMD CPUs

These are "official" temps and should not be exceeded. Personally, even if it says that your CPU can handle 70C I would try to keep it below 60C. Put simply, heat is bad and the AMD chips prefer to run cool. But at least you won't completely freak out if your chip runs up to 69C in a moment of instability. Happened to me with no ill effects. Most of the time I see low 50s under load.

Nice thread, GanjaSMK.
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post #3 of 8
Thread Starter 
Thank you!

I'm sure it'll need some editing and I asked to have it moved to the AMD CPU section instead of the general section, I think it is better suited there.
    
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post #4 of 8
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post #5 of 8
Thread Starter 
Many thanks!
    
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post #6 of 8
Nice write-up mate, will be sure to direct future questions that're covered by this so people have a better understanding of their chips, to this thread.

+rep
 
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post #7 of 8
Thread Starter 
Bump in hopes people read this, still seeing a lot of people unsure of temps or how to monitor them.
    
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post #8 of 8
I've a question....Recently I've posted in AMD General 'AMD 965BE skyrocketing temp'. My cpu core temp under load was ~72C but it didn't shut down. So is that indicating my cpu temp sensors are lame! mad.gif Because on every cpu monitor available my 'cpu temp' was less than my core 'temp'.
past:
http://www.overclock.net/t/1213242/amd-phenom-ii-965be-skyrocketing-temp

present:
http://cdn.overclock.net/6/62/62c1a8ee_Untitled.png
http://cdn.overclock.net/5/56/5616c2f3_Untitled1.png
http://cdn.overclock.net/e/e7/e7787d8d_Untitled3.png

So do I need to claim warranty to AMD?? Because such overwhelming temps are making me sick redface.gif
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