The most stable under-volt voltage of Q6600

[kiriakos]

I am aware of that I am asking something not that usual

But I like to know what is the lowest core voltage , that the Q6600 stays 100% stable .

I am ready to finalize the assembly of my latest system ( look signature)
and currently I have the motherboard over a carton box , testing Bios settings, no HDD and OS loaded.

And at the begging, I manually set the lowest ever voltage that my Bios has,
0.8V and the CPU failed to boot.
Next test was at 0.950 , and it boots nicely , and runs even cooler .

And now I thought to write this thread , so to collect statistics and from others ..

( Currently I do not have load the OS yet ( XP pro ),and I am unable to run full scale tests )


.

 

[Ben90]

0.7543857239578230570235721782564159203746109576120349612874501560564385723957823057023572178256415920374610957612034961287450156056438572395782305702357217825641592037461095761203496128745015605643857239578230570235721782564159203746109576120349612874501560564385723957823057023572178256415920374610957612034961287450156056438572395782305702357217825641592037461095761203496128745015605643857239578230570235721782564159203746109576120349612874501560564385723957823057023572178256415920374610957612034961287450156056438572395782305702357217825641592037461095761203496128745015605643857239578230570235721782564159203746109576120349612874501560564385723957823057023572178256415920374610957612034961287450156056438572395782305702357217825641592037461095761203496128745015605643857239578230570235721782564159203746109576120349612874501560564385723957823057023572178256415920374610957612034961287450156056438572395782305702357217825641592037461095761203496128745015605643857239578230570235721782564159203746109576120349612874501560564385723957823057023572178256415920374610957612034961287450156056438572395782305702357217825641592037461095761203496128745015605643857239578230570235721782564159203746109576120349612874501560564385723957823057023572178256415920374610957612034961287450156056438572395782305702357217825641592037461095761203496128745015605643857239578230570235721782564159203746109576120349612874501560564385723957823057023572178256415920374610957612034961287450156056438572395782305702357217825641592037461095761203496128745015605643857239578230570235721782564159203746109576120349612874501560564385723957823057023572178256415920374610957612034961287450156056438572395782305702357217825641592037461095761203496128745015605643857239578230570235721782564159203746109576120349612874501560564385723957823057023572178256415920374610957612034961287450156056438572395782305702357217825641592037461095761203496128745015605643857239578230570235721782564159203746109576120349612874501560564385723957823057023572178256415920374610957612034961287450156056438572395782305702357217825641592037461095761203496128745015605643857239578230570235721782564159203746109576120349612874501560564385723957823057023572178256415920374610957612034961287450156056

is the exact lowest voltage a Q6600 needs to be stable.

 

[kiriakos]

Nice Joke ..

 

[TBSN]

CPU's are all different. You have to test it yourself. There's a sticky at the top of this forum that explains overclocking. You're basically doing the same process but keeping the stock speed. Follow the same principles and reduce the voltage, test for stability, reduce the voltage more, test... repeat. It takes time.

 

[dguy6789]

Your question is no different from asking "What is the highest stable overclock for a Q6600?" Nobody can answer your question, it's different for every chip. You need to set the voltage yourself and run stability tests until you find the lowest stable voltage.

Edit: Beaten to the punch

 

[kiriakos]

There's a sticky at the top of this forum

Oh yes I have read that ... and I have read also the Intel specs and all the white papers.

And my intention are , as in my OP "to collect statistics and from others .."

 

[Idontcare]

Understand your statistics, if you get enough data to really apply any, will be convoluted owing to influence of external parameters on the stability of each given CPU.

For example it is not enough to specify the min-voltage (as an average voltage the CPU sees) because the CPU will also be sensitive at that point to any intermittent Vcc droops sent from the PSU to the CPU. A person might not recognize their PSU as being the cause of their CPU instability at a min-Vcc and instead they will just assume the CPU needs more Vcore and bump up the voltage another notch and report the result to you.

Meanwhile the same CPU in your mobo with your PSU and your ambients might be stable at a much lower Vcc.

And obviously if their ambients are different then their reported Vmin will be different, but not because the chip is different but because of the influence of external parameters.

So you just need to be aware of what it is you are actually setting out to collect statistics on...you are most assuredly NOT collecting statistics on the minimum voltage a Q6600 needs to be stable because so many other first-order parameters are not being held constant.

There is indeed a distribution of results to the question you ask, Intel has such data as it is infact the very data they collect when going about the process of determining the specs for a SKU such as the Q6600 on a per stepping basis.

But your results will never reflect theirs as you are not asking for the data you need to answer the question you have posed whereas in their carefully controlled labs they did what they needed.

 

[kiriakos]

The CPU core voltage , are not directly related with the PSU , the motherboard controls everything , and automatically cause corrections on the core voltage if needed , so to remain 100% as is set in Bios.

There is only one factor over debate .. The question of how true are the Bios voltage readings with the actual.

I bet that the electronics engineers in GIGABYTE , they have sort out this detail.
The current CPU works from 0.95 and not from the theoretical 0.8 , and even, if there is an 0.1V deviation (Bios VS True voltage) still does not look as big issue.

And lastly about temperature... We talk about not overclocked CPU, so its impossible the temperature range , that Intel did the testing and announced the results (voltage range) , to be that crucial , as stability factor.

 

[Idontcare]

<---...backs slowly out of the thread and makes a "note to self" entry regarding casting pearls before

The CPU core voltage , are not directly related with the PSU , the motherboard controls everything , and automatically cause corrections on the core voltage if needed , so to remain 100% as is set in Bios.

There is only one factor over debate .. The question of how true are the Bios voltage readings with the actual.

I bet that the electronics engineers in GIGABYTE , they have sort out this detail.
The current CPU works from 0.95 and not from the theoretical 0.8 , and even, if there is an 0.1V deviation (Bios VS True voltage) still does not look as big issue.

And lastly about temperature... We talk about not overclocked CPU, so its impossible the temperature range , that Intel did the testing and announced the results (voltage range) , to be that crucial , as stability factor.

 

[kiriakos]

<---...backs slowly out of the thread and makes a "note to self" entry regarding casting pearls before

Say this again using words that you will use on a child at the age of 7.
I am not American , so to understand easily such " typos "