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Thread: Tj max

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    Default Tj max

    Hi guys !

    look what i found:



    found on:

    http://www.tomshardware.co.uk/intel-...ews-29460.html

    so according to those tables tj max of my cpu is 90 ( not 95, or 100) and therefore when i changed those details in everest my temps are:


    Last edited by Geralt; 27-12-2008 at 12:12.

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    Default how to change tj max!

    I'll show you how to change tj max in two most popular programs

    everest
    coretemp


    EVEREST (MY VERSION IS 4.60.1500):

    GO TO PREFERNCES IN EVEREST AND IN THERE SELECT OPTION HARDWARE MONITORING:



    in here you can change the TJMax


    CORE TEMP:

    Go to folder where your core temp is located and open CoreTemp.ini:



    now change the value of TjMaxOffset ie: tjmax for my CPU was set to 100 C by default and the TjMaxOffset was 0 so to get tjmax of 90 i had to put TjMaxOffset as -10

    hope it helps!

    Andrew aka Geralt

    " There are some things Man should not know, for rest is Google"
    " Never argue with an idiot, he'll drag you to his level and beat you with experience"




  3. The following users thank 2 For this above post:

    Skyguy (27-12-2008), slngsht (10-01-2009)

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    Default

    Geralt,
    didn't you say you have B1 Q6600?
    that table is not up today, for example I have 45nm Q9650 E0 stepping.
    There is one thing about the table is not quite clear about 45nm CPUs. The QX9650 is run cooler than mainstream Q9xxx series? QX have 130w TDP instead of 95w, huh? :confused:

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    Quote Originally Posted by Deton View Post
    Geralt,
    didn't you say you have B1 Q6600?
    that table is not up today, for example I have 45nm Q9650 E0 stepping.
    There is one thing about the table is not quite clear about 45nm CPUs. The QX9650 is run cooler than mainstream Q9xxx series? And QX has 130w DTP instead of 95w, huh? :confused:
    Nope I have G0 stepping SLACR model of my CPU.


    Look i dont wokr for intel () so its hard for me to interpret those values. Besied those information were realesed somwhere in october and were about chips that were realesed year before so with that pace such info will be widely available probably somewhere in mid/ late 2009 for your chip.... well i'll have a look around and i'll post if i'll find anything

    edit: ok i found a handy tool for identyfing your chip:

    http://processorfinder.intel.com/Default.aspx

    and according to that tool thermal specification of my chip is 71 C....

    http://processorfinder.intel.com/det...px?sSpec=SLACR

    soo i dont know now should my tj max be 70?? or did i misinterpret it coz for Detons chip it shows 71.4 C.....???? NOW im confused......
    Last edited by Geralt; 27-12-2008 at 14:12.

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    Quote Originally Posted by Geralt View Post
    soo i dont know now should my tj max be 70?? or did i misinterpret it coz for Detons chip it shows 71.4 C.....???? NOW im confused......
    LOL ...welcome to the club, I think the 70c is the maximum the chip can go up to before it shut down. The thing is if you change the TjMax in Everest or CoreTemp...etc to low then you temp will drop. I think Everest is default at Auto which is mean the program will read the CPU TjMax automaticly and adjust its reading accordingly, I think?

    Are we confusing yet?

    I found this, hopefully it helps
    http://www.ocforums.com/showthread.php?t=525629

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    Quote Originally Posted by Deton View Post
    LOL ...welcome to the club, I think the 70c is the maximum the chip can go up to before it shut down. The thing is if you change the TjMax in Everest or CoreTemp...etc to low then you temp will drop. I think Everest is default at Auto which is mean the program will read the CPU TjMax automaticly and adjust its reading accordingly, I think?

    Are we confusing yet?

    I found this, hopefully it helps
    http://www.ocforums.com/showthread.php?t=525629
    yeah but he wrote all that before the realese of the tj max i mentioned above.... he wrote that in 08/2007 and those specs were realesed in october 2008. Soe he was basing on false information....

    and i thinlk in everest it must have simply a table of tj max for particular chips beacuse if tj max would be "physically " stored on the CPU itself there woudlnt be that whole discussion coz all the programs for monitoring the temps would be able to retrive it from the chip itself.....
    Last edited by Geralt; 27-12-2008 at 14:54.

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    Quote Originally Posted by Geralt View Post
    yeah but he wrote all that before the realese of the tj max i mentioned above.... he wrote that in 08/2007 and those specs were realesed in october 2008. Soe he was basing on false information....

    and i thinlk in everest it must have simply a table of tj max for particular chips beacuse if tj max would be "physically " stored on the CPU itself there woudlnt be that whole discussion coz all the programs for monitoring the temps would be able to retrive it from the chip itself.....
    Well the article just explained how TjMax work.

    How much different if you leave TjMax on Auto vs to manually input the value?

    I think Everest has a data table built in because they constantly releases the update though.

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    if i leave on auto under load temps are hitting 65. When i change it manually to 90 ( according to the table above) it peaks at 55 soo I hope that table is right

    " There are some things Man should not know, for rest is Google"
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    So according to Intel Finder, the Q6600 G0 and Q9650 E0 is almost the same TjMax and if I change the TjMax from 100c then my temps will drop 10c.

    My core idle temps are in 40c with Auto setting (100c), if I change to 90c, it will drops to 30c.
    Damn I wish it is true because the load temp only 50c @ 4.1Ghz overclocked.

    We need to find out the real fact figures here.

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    Quote Originally Posted by Deton View Post
    So according to Intel Finder, the Q6600 G0 and Q9650 E0 is almost the same TjMax and if I change the TjMax from 100c then my temps will drop 10c.

    My core idle temps are in 40c with Auto setting (100c), if I change to 90c, it will drops to 30c.
    Damn I wish it is true because the load temp only 50c @ 4.1Ghz overclocked.

    We need to find out the real fact figures here.

    well i dont know now coz according to that table the q9000 series have Tj of 100..... so your setting might be right although i know that 45nm chips should be cooler than 65nm ones.... But to get that logically newer chips should have higher Tj than the older ones.... i think... Beacuse Tj is just higest operational temp before switching off....

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    does anyone have one of those laser temp. readers? cuz then you would be able to figure out what the chip is actualy running at
    http://img246.imageshack.us/img246/5522/881217549921tl2.png

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    ok, done a a bit of reading about it and here's couple of things:

    to check wheter those temps above are right or not try to run your systen @ stock settings and if core tenps will go below ambient then you know that somethings not right there.
    I tried it myslef and with Tj Max to 90 my core are idling @29 ( where ambient is around 20). So it loooks ok for me.

    Now there's another thing i've read but i cant find now reference to it ( to many intels data sheets i've read for past two days) which is the fact that core temps cant have offset more than 5 degrees from Tcase temp. So if you have in everest CPU temp of 25 then core temps shouldnt go higher than 30. Now i know its hard to belive but i really did red it somwhere on those sheets (just cant find which one).
    But taking it logically i think thats the best explanation beacuse the Tj Max value only applies to DTS (digital thermal sensors) which are on the cores and not to the diode that is located in geometrical centre of CPU( try to change your tj Max to 85 and you'll see taht the cores can be cooler than the CPU - btw good tip to fake the results in everest).
    So IMO on such small space temps differences grater than 5 dgerees arent possible coz that heat spreads all around the cores and affects the diode as well.
    So differences of 10 or 15 degrees between the CPU temps and core temps are hard to belive on such small space.

    @smith: such sensor would give us only temp of the CPU in general , not the cores themselves.... and thats whats it all about

    what do you think of it??
    Last edited by Geralt; 29-12-2008 at 07:53.

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    Well, this is how I understand about the TjMax.

    Example; according to the TjMax table the Q6600 with B & L stepping have 80 TjMax and the G0 have 90, and we are all know the B stepping version run hotter than G0 version due to higher voltage at the same overclocked frequence.

    Next example; take a look at QX9650 and QX9770, the QX9650 have 95 and 85 for QX9770. We know the QX9770 run hotter than QX9650 because it has 135w TDP instead of 130w.

    So the TjMax is the maximum temp that the chip can run before it shuts down. Therefore the higher TjMax rated the better the chip can operate but what I don't understand is when you lower the TjMax in CoreTemp or Everest then the temp will lower too?

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    i guess this must be implemented into some equation which gives you the readings

    ie:

    90 ( tjMax) * 0.2( lets say this is some DTS readout) = 18

    but

    100 * 0.2 = 20

    so maybe thats how its being implemented, beacuse TjMax value affects the temps of the cores but doesnt affect the temp of the CPU itself..... So you can setup a paranoind example where cores will run cooler than CPU althougheter.....

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    ok, so here's a request:

    Any of you Gentleman have any contact for intel to confirm those values above??? I guess that would be the best solution in that case

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    I guess TheCoolest can anwser this, whenever he's come around. He's the one wrote CoreTemp program.

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