Stock i7 VCore?

Broken Hope · 10 Mar 2010 at 19:09

What's the stock voltage of these processors supposed to be, my mobo set to auto sets it to 1.3, isn't that a bit high? Isn't it meant to be around 1.2?

cmndr_andi · 10 Mar 2010 at 19:14

Aye, seems quite high.

Personally, I run my D0 at 1.19 V @ 3.6GHz, so if you are running at stock speeds you should be able to run on even less.

setter · 10 Mar 2010 at 19:15

At stock idle, cpuz displays my voltage at 0.944v, however, unlike previous intel cpu's there's no vid displayed for the i7's, when it came to overclocking my i7 920 DO i first set it to 1.2500 for a 3.0ghz overclock, was advised on here to drop it to 1.1800, at this voltage i was able to clock it upto 3.6ghz, only needing a jump to 1.2750 for 3.8 and 4.0 ghz. 1.200 would be a good starting point.

bhavv · 10 Mar 2010 at 19:18

Mine needs 1.4v for 4.0 Ghz+. Thats why I were never able to go over 3.8 Ghz first because I were afraid to raise it past 1.3v, but I didnt get a lucky golden chip like everyone else

easyrider · 10 Mar 2010 at 21:14

bhavv said:
Mine needs 1.4v for 4.0 Ghz+. Thats why I were never able to go over 3.8 Ghz first because I were afraid to raise it past 1.3v, but I didnt get a lucky golden chip like everyone else

Is that a D0?

the wopster · 10 Mar 2010 at 21:16

mine needs 1.39 for 4.3

twitch · 10 Mar 2010 at 21:52

It does seem a bit high..

Mine at the moment is set to 1.275 both core and vtt @ 4 ghz running prime, usually run 1 step higher but got to do a 24 session of prime at the weekend so seeing if I can run even lower..
As we need to do a 24 hr session to prove a stable clock

JonJ678 · 10 Mar 2010 at 22:45

Vid range is 0.80V - 1.375V. I.e. the default voltage for your 920 can be anywhere in this range.

People correlete low vid with a high overclocking chip. Evidence for this is a bit sparse, what voltage the chip actually needs to run stock speeds would be a better indication. This is what vid nominally should be, but intel tend to overestimate to make sure it'll run at this speed on any motherboard.

setter · 10 Mar 2010 at 23:16

JonJ678 said:
People correlete low vid with a high overclocking chip. Evidence for this is a bit sparse,

Good point, though one thing i did notice with s775 cpu's, low vid chips tended to generate a lot more heat when overclocked, both my s775 quads (q6600 and q9550) were mid range vid wise, 1.2750 and 1.200 respectively, both clocked pretty well, 3.8ghz each and both ran cool, albeit the q6600 was lapped.

Broken Hope · 11 Mar 2010 at 00:01

After manually setting the vcore it no longer switches lower when the cpu is clocked down by speedstep, I'm guessing there is no way around this?

fornowagain · 11 Mar 2010 at 00:07

Have a look and see if the UD3R implement's DVID in the latest bios.

Marine Iguana · 11 Mar 2010 at 00:09

bhavv said:
Mine needs 1.4v for 4.0 Ghz+. Thats why I were never able to go over 3.8 Ghz first because I were afraid to raise it past 1.3v, but I didnt get a lucky golden chip like everyone else

same here 1.4v for 4.1ghz

Broken Hope · 11 Mar 2010 at 00:15

fornowagain said:
Have a look and see if the UD3R implement's DVID in the latest bios.

It has the option for DVID, what do I have to change with it?

fornowagain · 11 Mar 2010 at 03:21

Broken Hope said:
It has the option for DVID, what do I have to change with it?

fornowagain said:
With DVID, couple of things you need to start with.

Vcore needed for your 100% loaded stable clock.

Your cpu's default voltage, differs from chip to chip.

To get the first one check cpu-z under 100% load, use prime or linx etc. The second one is a little more involved, set the multi lower in the bios, way down (default cpu speeds). Set the vcore to normal. Reboot into windows, again check the actual vcore under load.

Now back in the bios (obviously put the multi back), leave/set the vcore to normal. In the advance settings set the DVID offset number to the difference between the overclock vcore and the default vcore.

e.g. on a 4Ghz clock D0. 1.2625-1.2125=0.05v

Now go and check the 100% load value in windows is the same as the original overclock value. You could also try using the default Vcore displayed in the bios, but of course that takes no account of the vdrop+vdroop. Should work though (just note, default Vcore in bios can change with turbo mode on/off). You should now see the vcore changing with the load and drop even lower with speedstep.

Some other settings that seems to be successful with it. LLC enabled, disable C1E (stops MB buzzing apparently), enable all other energy features, "C3/C6/C7 State Support" etc. Power management profile within Windows set to high performance.

rjk · 11 Mar 2010 at 09:35

remember - i7 has a VID range of around 0.98v to 1.325v

this was true with the C0 and D0 steppings.

it might just be the chip

bhavv · 11 Mar 2010 at 11:58

easyrider said:
Is that a D0?

Yup. Its a D0 920.

1.3v is only good for 3.8 Ghz, it needs 1.344v for 4.0 Ghz, and 1.396v for 4.2 Ghz for it not to BSOD.

I werent as lucky as everyone else, and it seems that the new I7 930 is similar to my chip, so I'm going to wait for the I7 970 and hope it doesnt cost more than £300.

Lt Goody · 11 Mar 2010 at 12:51

Broken Hope said:
What's the stock voltage of these processors supposed to be, my mobo set to auto sets it to 1.3, isn't that a bit high? Isn't it meant to be around 1.2?

My voltage is 0.93v set on auto with turbo on so it's running at 2.9ghz,so yes yours is high.

Nocky24 · 12 Mar 2010 at 11:30

bhavv said:
Yup. Its a D0 920.

1.3v is only good for 3.8 Ghz, it needs 1.344v for 4.0 Ghz, and 1.396v for 4.2 Ghz for it not to BSOD.

Is that with LLC enabled aswell?

maximmax · 13 Mar 2010 at 17:52

Stock i7 VCore

if your using the stock sink, you dont need to worry about what TIM your using.

Because your sink will limit you in overclocking anyhow.

So i would listen to mark, and either leave it as be, clean it off with alcohol and use a better tim.

But dont do both.