- Oct 9, 1999
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I'm curious about different Vcore settings for the Core 2 Duo.
I realize that when you set Vcore to "Auto" the motherboard will supply enough current to the cpu to keep the voltage constant and that is why "Auto" Vcore settings will send cpu temps through the roof.
Of course the trick is to find a Vcore setting that when under load won't droop so much to make your system unstable but not so high that it will cook your cpu.
Here is what I have found using cpuz (v1.38) and Orthos.
At stock settings my P5B-Deluxe and E6400 with Vcore on auto idles and loads at 1.280 Volts.
Overclocked to 3.2 (everything else the same) it idles and loads at 1.213 Volts.
Question - Why would less current be supplied to the cpu on auto when overclocked? What logic in this circuit could account for this?
Perhaps (and this is just a theory) if your system run stably when overclocked with Vcore set to auto you can take that setting and try to match it with a manual setting.
For example, overclocked to 3200 my auto Vcore is 1.213 Volts. When manually set to Vcore=1.35, under load my Vcore=1.28.
Using my theory I should lower my Vcore manually until my load Vcore as reported by cpuz is about 1.213, and hopefully I would remain stable.
This could save some time in finding a minimum stable voltage.
I would be very interested to know what other people's Vcore is when set to auto, both at stock settings and overclocked.
Why?
First, perhaps, just perhaps, there is some info in each cpu that the motherboard "reads" when setting Vcore at certain speeds.
Second, this might just be standard from motherboard to motherboard.
Anyway, I'm sure some of the more knowledgeable guys and gals here will figure this out. I'm just thinking out loud here.
So if you could please report your cpu model, motherboard model, and Vcore as reported by cpuz at both stock and overclocked speeds.
I realize that when you set Vcore to "Auto" the motherboard will supply enough current to the cpu to keep the voltage constant and that is why "Auto" Vcore settings will send cpu temps through the roof.
Of course the trick is to find a Vcore setting that when under load won't droop so much to make your system unstable but not so high that it will cook your cpu.
Here is what I have found using cpuz (v1.38) and Orthos.
At stock settings my P5B-Deluxe and E6400 with Vcore on auto idles and loads at 1.280 Volts.
Overclocked to 3.2 (everything else the same) it idles and loads at 1.213 Volts.
Question - Why would less current be supplied to the cpu on auto when overclocked? What logic in this circuit could account for this?
Perhaps (and this is just a theory) if your system run stably when overclocked with Vcore set to auto you can take that setting and try to match it with a manual setting.
For example, overclocked to 3200 my auto Vcore is 1.213 Volts. When manually set to Vcore=1.35, under load my Vcore=1.28.
Using my theory I should lower my Vcore manually until my load Vcore as reported by cpuz is about 1.213, and hopefully I would remain stable.
This could save some time in finding a minimum stable voltage.
I would be very interested to know what other people's Vcore is when set to auto, both at stock settings and overclocked.
Why?
First, perhaps, just perhaps, there is some info in each cpu that the motherboard "reads" when setting Vcore at certain speeds.
Second, this might just be standard from motherboard to motherboard.
Anyway, I'm sure some of the more knowledgeable guys and gals here will figure this out. I'm just thinking out loud here.
So if you could please report your cpu model, motherboard model, and Vcore as reported by cpuz at both stock and overclocked speeds.
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