Anyone know the TJ Max for a Q9450 or Q9xxx series?

[SiD the Turtle]

Hi guys,

I'm currently investigating some heat issues on my CPU and I wanted to check that the TJ Max settings of Real Temp and SpeedFan, which are currently set to 100, were accurate. A Google sugests some debate on whether it's 85, 95 or 100.

Any ideas? It's a Q9450 C1 revision. If you know the answer do link to your source, it'd be nice to know if there is somewhere out there I can use as a reference!

 

[Justintime]

Why bother with the actual figure which may never be known due to different tolerances in different chips etc.. ? Just be concerned with the actual distance to tjmax which i'd like to keep around 20C away from on max load.

 

[ns400r]

How can you be 20ºC away from a figure you don't know or aren't bothered about?

 

[setter]

According to this document its 100c for the 45nm quads.

http://www.tomshardware.co.uk/intel-dts-specs,news-29460.html

I remember there being some debate on various boards about the 65nm quads, such as the q6600 as to wether it was 90c, 95c or 100c.

 

[Justintime]

How can you be 20ºC away from a figure you don't know or aren't bothered about?

What are you on about? Intels DTS does not read temperatures, only a value which is distance to TJmax. Realtemp etc.. will tell you what your distance to Tjmax is and depending on what your Tjmax is set at in the software it derives its temperature reading. For instance if your Tjmax was set to 100C and your distance to Tjmax as read from the DTS was 20 then you woud see a temp of 80C, if your Tjmax was set to 80 you would see a temperature of 60C, totally misleading if the Tjmax of the chip is set wrong but quite safe, hence why i disregard temp readings and go by distance to Tjmax reading as that is the most accurate, temperature readings are only estimated by software and can be way off as even Intel stated true Tjmax can vary from chip to chip. In my opinion if you are around 15-20C away from this maximum value at max load (i.e prime95 /IBT ) then the cooling is adequate.

 

[SiD the Turtle]

Cheers for the help guys. Reading temperatures on processors can be a minefield, but having an idea of what in theory the TJ Max should be does help.

After an hour running prime 95 with TJ Max set to 100 my processor is hitting 72c now, which is 28c away from TJ Max. I think I've been mis-reading the 'thermal specification' on the Intel processor which states 71.4c, which worried me somewhat when I was running at 72c.