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Q6600 voltage required to boot ?

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s60_user   06-09-2009 at 03:45:17 PM

Hi there ! I would like to know if my Q6600 G0 underclocked to 1.8 GHz @ 1V will be able to start up after i shut down the system ? It's absolutely stable by the way (of course).
To put it in another way: do I need to set the Vcore >1.10V or is 1.10V a fixed value for Vcc_boot that can't be changed and is used at startup ?


Message edited by s60_user on 06-09-2009 at 03:56:33 PM
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flyin15sec   06-09-2009 at 06:06:52 PM
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You should be fine, based on Intel's spec, you can go as low as .85v, before it will not boot.

**EDIT, let me rephrase myself. I could be wrong.

The 1.1v required to boot is supplied by the VRM from the motherboard. After motherboard boot and powers the CPU, the CPU will cycle through it's VID to come to the one that is set for it. If it is too low, or too high, it will shut down.

So in essence, when we change the vcore, we are changing the default VID.


Message edited by flyin15sec on 06-09-2009 at 06:18:02 PM
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wuzy   06-10-2009 at 12:51:15 AM
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Quote :

It's absolutely stable by the way (of course).


While I can not confirm what flyin15sec said about 1.1v as I haven't read the datasheet myself, as long as you can boot with the current 1.0v being set in BIOS you're using and is stable under Windows as you've reported it to be then I don't see there's a problem.

A few extreme overclocking orientated motherboard do allow you to change Vcc_boot to much higher values for the purpose at booting much higher clocks, but for your purpose more Vcc_boot (an instantaneous voltage) than required will not restrict what you're trying to achieve.


Message edited by wuzy on 06-10-2009 at 12:51:57 AM
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kg4icg   06-10-2009 at 08:17:09 AM
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Why did you clock it down to 1.8 ghz when speedstep already clocks it down to 1.6 ghz, i don't see the need?

------------------------------ Did I hit you with a Mack Truck?

 

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flyin15sec   06-10-2009 at 03:15:42 PM
- 0 +

kg4icg, has a good question, which I would like to know also.

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