i7 CPU VID

[oggie]

How do I find it :confused:

[Kylzer]

Dunno can't find it on core temp or any program that i have tried for that matter.

[unclewebb]

Intel removed or moved VID information from the register where it was stored in Core 2 CPUs. There is nothing in the mountain of Intel documentation that I've read about how to read Core i7 VID. The official word is that it's no longer possible to read VID from these CPUs. That's why software doesn't report it anymore.

[DavyBoy]

I was under the impression that the voltage shown in white next to Vcore in the BIOS on a UD5 was the CPU's VID???

I have had 4 different i920's, and each chip had a different value on this bit I am referring to in the BIOS, though I am unsure about any other motherboards..

[DavyBoy]

http://img199.imageshack.us/img199/545/dsc00692xf.jpg

See in this screenie (not my BIOS screenshot btw), see how there is a value next to Vcore in white text?

This is what I believe is the processors VID, as I said in the last post, I have had 4 different 920's, and each chip has had a different value in there, some lower than others.

[unclewebb]

Interesting info BLunTSmoKeR. I've always believed that a motherboard needs to be able to ask the CPU how much voltage it requires which means that somewhere in the CPU, there has to be a register that contains this information.

In Core 2 CPUs, the register contained both VID and multiplier information. When Core i7 came out, they dropped VID information and moved the multiplier info within this register. VID info just disappeared and the word from Intel was that it's not possible to read VID from Core i7 but I've always found that a little hard to believe.

I'll never understand what makes Intel tick. VID is information that enthusiasts would like to know but Intel doesn't provide a method in their publicly available documentation for programmers to read this info from the CPU, not even for Core 2.

[Kylzer]

If thats true i have a good vid :)

[DavyBoy]

Well, I am fairly sure what I have stated is correct guys.

And according to the Intel spec sheets, the i7 VID can vary from 0.80 - 1.375 V... my first chip used to read 1.1945v, but the 3 chips I have had since that one have all been above 1.2v.. Oh, and this figure in the BIOS changes when Turbo is enabled or disabled to.

Like I said though, I have always been under the impression that this was the chips VID, and other people on various forums have also stated this as well..

[Sem]

to find the VID on my i7 i left it at stock and the vcore to auto in the bios

then used cpu-z + the bios hardware monitor and they both said my voltage at stock between 0.950-0.975

so im guessing my VID is around 0.975

[cliffy]

Try this again but check the speed of your cpu when you do it, think your looking at the voltages when speedstep is kicked in. Run a couple instances of superpi or something that will stress the cpu out a little that will give you the correct voltage

[Sem]

speedstep and C1E are always disabled

the 0.950v is at 2.67Ghz

[DavyBoy]

Like I said, the VID on these chips can vary from 0.80 - 1.375 V.

[unclewebb]

Core 2 chips have a minimum and maximum VID. When everything is set to AUTO in the bios, you'll get one voltage at idle and a different voltage at full load. Core i7 is likely the same. On the Core 2 mobile chips you can see a variety of different VID values as you go from idle to full load and back again.