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Q6600 VID question - Page 4

post #31 of 35
I feel gypped, VID of 1.325, and it can only do 3.4 on 1.48 volts.
    
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post #32 of 35
Quote:
Originally Posted by Benny99 View Post
Uhh...

Really just because you have a higher VID dosent mean the chip wont overclock as well or take more voltage to reach a specific overclock.

The VID determines nothing .
How do you know this? I don't have any proof either way except myself and several others need 1.5+v to hit 3.5Ghz whereas people with lower VIDs seem to be able to hit 3.6Ghz with 1.45v or lower. Admittedly not many people have responded so it could just be coincidence. I'd happily be wrong
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post #33 of 35
Anyone else know anything about VID's?
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post #34 of 35
Chances are that if Intel thought they could run on substantialy less voltage, with similar thermal parameters, they would have given the chips a lower VID.

All other things being equal, lower VID chips do tend to OC better. However, their is still a great deal of variation.

Also, with some newer chips, CoreTemp has been reporting the wrong VID. For the 45nm chips, RealTemp is usually accurate.
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post #35 of 35
Quote:
Originally Posted by spazbob View Post
Anyone else know anything about VID's?
I posted this in another thread, but it's still pertinent...

I've downloaded and read(only a little) through these two PDFs(archived so I could upload):

C2DInfo.zip

Core 2 duo Desktop processors Sequences (data sheet) PDF:

2.3 Voltage Identification Paragraph 4

Quote:
The processor provides the ability to operate while transitioning to an adjacent VID and its associated processor core voltage (VCC). This will represent a DC shift in the load line. It should be noted that a low-to-high or high-to-low voltage state change may result in as many VID transitions as necessary to reach the target core voltage. Transitions above the specified VID are not permitted. Table 5 includes VID step sizes and DC shift ranges. Minimum and maximum voltages must be maintained as shown in Table 6 and Figure 1 as measured across the VCC_SENSE and VSS_SENSE lands. The VRM or VRD used must be capable of regulating its output to the value defined by the new VID. DC specifications for dynamic VID transitions are included in Table 5 and Table 6. Refer to the Voltage Regulator-Down (VRD) 11.0 Processor Power Delivery Design Guidelines For Desktop LGA775 Socket for further details.
VRD 11.0 guidlines PDF:

2.6.1 Dynamic-Voltage Identification functionality

Quote:
VRD11 architecture includes the Dynamic Voltage Identification (D-VID) feature set, which enables the processor to reduce power consumption and processor temperature. Reference VID codes are dynamically updated by the processor to the VRD controller via the VID bus when a low power state is initiated. VID codes are updated sequentially in 12.5 mV steps and are transmitted every 5 microseconds until the final voltage code is encountered. Processors are capable of transitioning from
standard operational VID levels to either the VR11 or extended VR10 VID table minimum values. They are also capable of returning to a higher VID code in a similar manner. The low voltage code will be held for a minimum of 50 microseconds prior to sequentially transitioning through the VID table to a new voltage reference which can be any higher VID code, but is generally the original reference VID.
Basically what all that means is that the VID is dynamic and changes when power savings features (EIST C1E ect) are implemented...

VID also varies between processors, and a lower VID is typically desired as it directly translates into lower temps and less power consumption... Often times a CPU with a low VID is a good overclocker, though it is not guaranteed. While a CPU with a higher VID is less likely to be a good OCer that isn't always the case either...

The lowest possible VID for a Q6600 is 1.1 and I believe it's highest VID is 1.35. Here's an insightful thread (thanks for the link Indignity) ->

http://www.hardforum.com/showthread....ight=q6600+vid

Quote:

Edited by MasterKromm - 5/22/08 at 12:02pm
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