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Q6600 - Understanding Thermal Specifications...

post #1 of 5
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OK, I wanted to make sure I understood this correctly... The maximum temperature that an intel processor can handle before shutting down (or worse) is actual a sliding scale based on the amount of wattage it's currently consuming, correct?

Additionally, this value is the CPU's main temp sensor and not the values reported by the individual diodes/dies/processors, right?

So, if under peak loads, my wattage runs between 65-75W and my CPU temp sensor only reads around 39C (individual diodes around 47C) I'm well within spec, correct? Just wanted to double check because I tried to explain the whole concept of the sliding scale and I talked myself into a circle until I was thoroughly confused myself...



Edited by arjo_reich - 12/13/08 at 5:28pm
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post #2 of 5
When they refer to 71 degrees being the point you don't want to exceed, they are indeed referring to Tcase, not the individual on-die sensors. At least for the Core2 chips.

For the Q6600 G0, it will begin thermal throttling (if you haven't disabled it in BIOS) somewhere in the vicinity of Tjmax, which is 90 C for this chip. (Most software misreports Tjmax for the Q6600 as 100 C.) Slight factory calibration errors may change the actual temperature where this begins happening. In your BIOS this is "CPU Thermal Monitor 2(TM2)."

If the thermal throttling fails to cool the CPU (or, again, you disabled it) then at some point above Tjmax the CPU will just shut itself down to prevent any real damage, and you will have to power cycle or hit the reset button. This function cannot be disabled.

Of course, the datasheet is assuming that the CPU is run at stock speed and Vcore = VID. When you've disabled TM2, overclocked it, probably overvolted it, and installed aftermarket cooling, Table 29 is no longer relevant.

The stock thermal design assumes that the chip will not be supplied more voltage than it requests on the VID pins, that the stock HSF will be used, and that automatic fan speed control is in use on the mobo. This results in a chip that runs warmer than we overclockers would like, at load or at idle, in the stock configuration. Nevertheless such a chip is expected to survive the warranty period.

You still want to keep temperatures as low as you can. The reason is that when you OC it, and pump in more voltage, it speeds up electromigration. Heat further accelerates electromigration. So an overvolted chip may or may not survive the warranty period depending on how far it's overvolted and how well it's cooled. There's no real way to predict when an OC'd chip might fail, though the closer you run the voltage to the absolute limit (1.55V in this case) the shorter lifespan you can expect. Generally. People have reported running their Q6600s at 1.6-1.7V for months at a time (under water or phase).

If you're still confused, I don't blame you.
Edited by error10 - 12/13/08 at 6:03pm
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post #3 of 5
very well said error.....very well indeed
    
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post #4 of 5
I have a XFX 680i LT - Q6600 - Duel 9800GTX's Overclocked, and its bottlenecking, And i also have a 650watt power supply with 4gb of ram im runnin XP Home edition, My Computer has lots of fans stays cool,

P.S( I'm new here couldnt figure out how to post a new Thread, lol )


Okay, I want to Overclock my CPU to 2.8ghz or 3.0ghz, But i never done it befor, Anybody kno the Settings i can bump it up to 2.8 or 3.0ghz's?
Thanks.. Inneed of help
post #5 of 5
Quote:
Originally Posted by tyler11708 View Post
I have a XFX 680i LT - Q6600 - Duel 9800GTX's Overclocked, and its bottlenecking, And i also have a 650watt power supply with 4gb of ram im runnin XP Home edition, My Computer has lots of fans stays cool,

P.S( I'm new here couldnt figure out how to post a new Thread, lol )


Okay, I want to Overclock my CPU to 2.8ghz or 3.0ghz, But i never done it befor, Anybody kno the Settings i can bump it up to 2.8 or 3.0ghz's?
Thanks.. Inneed of help
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