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Vcore what to trust? - Page 2

post #11 of 16
Thread Starter 
Quote:
I've never had any issues or dead cpu's.
OK thats what I wanted to hear, Thanks
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post #12 of 16
I have the same board you do and noticed a similar thing. Posted about it in the PSU area as I was wondering if my PSU was bad.



I set my BIOS to 1.2875 (IIRC) and in PC Probe, AIBooster, CPU-z, ect, all read as idleing at 1.31-1.34. Under load, this drops to 1.23-1.24. I up my Vcore to 1.3 in BIOS and it still shows 1.34 or so at adle, then it drops to 1.26-1.28 under full load.

As has been mentioned here, I was told this is normal....


However, I don't have the discrepencies you are seeing..... PC PRobe 2 and AIBooster are both showing the same Vcore as CPU-z, sometimes they fluctuate a little off, 1.31 on PC Probe while CPU-z says 1.34.....but then they match up again, it seems like just a polling time delay........
post #13 of 16
Quote:
Originally Posted by Ropey
Do not worry about this movement. Don't be a "Spike Obsessor" j/k
R
I'ts not about worring but the Vc fluctuation, mostly seen in the P5WD2-Premium and P5WD2-E Premium, I'm not sure about the 945Ps because AFAIK when I had my 650 in the ABIT AG8-3rd Eye, the Vc was alway dead on....1.223v-1.388v.

Put the 650 in the P5WD2-P and Vc was fluctuating a lot till I started to do some heavy task then the AIBooster and CPU-Z showed the correct Vc. Put my new/used 660 and it did the same thing....CPU VID? Weird because no CPU Vc fluctuation in my AG8-3rd Eye 915P, always accurate.

There's a Vdroop for the P5WD2-Premium but I'm not doing that, I may screw something up and be out $200.
post #14 of 16
Thread Starter 
Quote:
have you tried getting 4.23ghz out of that 560 yet?
My 660: look at the Vc fluctuation.
I got 4.2 solid today
My first overclock
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post #15 of 16
Quote:
Originally Posted by Nasgul
Put the 650 in the P5WD2-P and Vc was fluctuating a lot till I started to do some heavy task then the AIBooster and CPU-Z showed the correct Vc. Put my new/used 660 and it did the same thing....CPU VID? Weird because no CPU Vc fluctuation in my AG8-3rd Eye 915P, always accurate.
Here's the thing Nasgul. I do not trust any readout that gives "solid readings" as the VID does not allow the CPU solid instructions for PLL readout of the Vcore. It is a multiple instruction set and if you are doing multiple tasks (remember your cpu in the background is performing multiple tasks at any rate) then your Vcore will fluctuate. It is only when the system is performing intensively does the Vcore stabilize and it stabilizes at the needed Vcore for the intensive application and this Vcore can change with different intensive applications.

Thus it is more "weird" that your AG8-3rd Eye 915P does not fluctuate. This is not an accurate reading of the CPU VID. Yes, a vdroop will deal with droop voltages but much of the droop modification is geared towards stabilizing the readout, not the VID flow. So if one wishes a stabilized readout then they can perform a droop mod but if the droop has to do with the CPU VID instructions then they are not accomplishing anything other than stabilizing the readout of the PLL.

Great Overclock Stump

R
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post #16 of 16
That sounds right, as I said, my readout jumps a bit normally, but as soon as both CPU cores are loaded at 100%......it doesn't move really.


As long as my system tests stable, I'm not going to worry about it
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