Tom's Hardware > Forum > CPU & Components > CPUs > Does anyone know the TjMax value for the Q9450?

Does anyone know the TjMax value for the Q9450?

Forum CPU & Components : CPUs - Does anyone know the TjMax value for the Q9450?

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halcyon   04-29-2008 at 08:52:15 PM

I've read a lot of opinions on what the TjMax value is for the 45nm Core 2's. I've read that Core Temp's/Everest's 105C for TjMax on the 45nm is bogus (which is quite believable given all the postings of people saying their new processors are idling in the mid 50's C in Core Temp while the PWM fan on their TRUE coolers are barely running). I've seen that it may be 95C or it may be 85C.

 

Does anyone actually KNOW what TjMax is for the new 45nm C2D's & C2Q's (any links to intel documentation for articles/whitepapers by industry experts?).

 

Since I understand that TjMax is used (in a backward sort of way {something like TjMax - the DTS value = the core temp we see in our beloved utilities}) to calculate the temps it'd be nice to have a reliable number.

 

If this has been posted and my search missed it, my apologies.

 

Edit: I know RealTemp thinks its 95C. ...but I don't know that's any more correct than CoreTemp or Everest.


Message edited by halcyon on 04-30-2008 at 05:30:43 PM
------------------------------ 17" MacBook Pro: 2.66Ghz, 4GB DDR3-1066, 256GB Corsair P256 SSD
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jaguarskx   04-29-2008 at 10:39:40 PM
- 0 +

At stock speed using a Tuniq Tower with a Yate Loon 120mm fan, my Q9450 idles at 36C - 41C depending on the core (using Core Temp v0.97.1).

As for TjMax, I never really done research on that.

Message quoted 1 times
------------------------------ Q9450 |Corsair XMS 4GB DDR 800 | ABit IP35 Pro | HD 5850 | Audigy 2 | Seasonic S12 550 | Cooler Master Centurion 532 | NEC LCD2690WUXi and Planar PX2611w | WinXP

Peace on Earth by means of the destruction of all life on Earth.
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Shadow703793   04-29-2008 at 10:59:34 PM
- 0 +

PM CompuTronix he should know about the TjMax for the 45nm chips.

------------------------------ http://farm3.static.flickr.com/2617/3815217176_0a5be7955d_o.gif
http://farm4.static.flickr.com/3553/3818083596_1a772f7162_o.gif
 Reply to Shadow703793
halcyon   04-30-2008 at 04:00:06 AM
- 0 +

Thanks. I may indeed PM CompuTronix. However, the research that I've seen tells me that the Delta to TjMax is more important than the temps Core Temp, Everest, etc. are showing. So for now I'll rely on that...knowing I've got 30-40C room before my chip throttles is all I think I need to really know, for now, about temps.

Message quoted 2 times
Message edited by halcyon on 04-30-2008 at 04:00:48 AM
------------------------------ 17" MacBook Pro: 2.66Ghz, 4GB DDR3-1066, 256GB Corsair P256 SSD
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monst0r   04-30-2008 at 04:09:38 AM
- 0 +

halcyon wrote :

Thanks. I may indeed PM CompuTronix. However, the research that I've seen tells me that the Delta to TjMax is more important than the temps Core Temp, Everest, etc. are showing. So for now I'll rely on that...knowing I've got 30-40C room before my chip throttles is all I think I need to really know, for now, about temps.


Wouldn't you know the TJmax if you knew how much room was left? (just add :P)

e.g.

chips @ 61c. 29c left. TJmax would be 90c

at least that's what i get out of your post :)

Message quoted 1 times
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CompuTronix   04-30-2008 at 04:20:54 AM
- 0 +

halcyon wrote :

Thanks. I may indeed PM CompuTronix. However, the research that I've seen tells me that the Delta to TjMax is more important than the temps Core Temp, Everest, etc. are showing. So for now I'll rely on that...knowing I've got 30-40C room before my chip throttles is all I think I need to really know, for now, about temps.

 

halcyon, you started this thread asking for information, so if that's all you need to know, then I can't help you.

Comp :sol:

------------------------------ i7 920 @ 4.1 | Vcore Load 1.360
61c CPU & 66c Core @ 22c Ambient
Xigmatek HDT-S1283 | Push-Pull Fans
Core i7 and Core 2 Temperature Guide --> http://www.tomshardware.com/forum/ [...] ture-guide
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skittle   04-30-2008 at 04:27:10 AM
- 0 +

How come intel doesnt publish these?

------------------------------ macgirlfriend:
"Hey I don't get you people, the people on insanely mac were so much nicer"
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Jake_Barnes   04-30-2008 at 05:11:27 AM
- 0 +

The title of this topic has been edited by Jake_Barnes

------------------------------
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skittle   04-30-2008 at 05:17:12 AM
- 0 +

The title of this topic has been unedited by skittle

------------------------------ macgirlfriend:
"Hey I don't get you people, the people on insanely mac were so much nicer"
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halcyon   04-30-2008 at 12:39:57 PM
- 0 +

I don't know why intel won't publish these but I'm sure they've got some good intel-centered reason.

------------------------------ 17" MacBook Pro: 2.66Ghz, 4GB DDR3-1066, 256GB Corsair P256 SSD
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skittle   04-30-2008 at 03:14:13 PM
- 0 +

You would think they could atleast create their own temperature monitoring app... if they dont want to publish the information

someone needs to tell intel that secrets are bad!

------------------------------ macgirlfriend:
"Hey I don't get you people, the people on insanely mac were so much nicer"
 Reply to skittle
Grimmy   04-30-2008 at 04:35:01 PM
- 0 +

Intel prolly just don't want anyone to know how hot it really gets...

Some like it hot.... Somelikeit HHHott!!

:oops:

Reply to Grimmy
halcyon   04-30-2008 at 05:32:53 PM
- 0 +

jaguarskx wrote :

At stock speed using a Tuniq Tower with a Yate Loon 120mm fan, my Q9450 idles at 36C - 41C depending on the core (using Core Temp v0.97.1).

As for TjMax, I never really done research on that.




Jag, what mobo are you using...not the one in your sig I imagine.

------------------------------ 17" MacBook Pro: 2.66Ghz, 4GB DDR3-1066, 256GB Corsair P256 SSD
 Reply to halcyon
halcyon   04-30-2008 at 05:41:23 PM
- 0 +

monst0r wrote :

Wouldn't you know the TJmax if you knew how much room was left? (just add :P)

e.g.

chips @ 61c. 29c left. TJmax would be 90c

at least that's what i get out of your post :)



You'd think it'd be that straight forward, but I've read that at idle there can be quite a variance on the 45nm chips...as much as like +- 15C...this variance becomes much less pronounced as you approach TjMax...here's some interesting info on it: http://www.xtremesystems.org/forum [...] p?t=179044

------------------------------ 17" MacBook Pro: 2.66Ghz, 4GB DDR3-1066, 256GB Corsair P256 SSD
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