Q6600 owners... what is your VID?

graysky · Jul 27, 2007

If you own a Q6600, please reply with your VID and the stepping of your chip. The VID can be found using coretemp. If you're using vista, coretemp will not display the stepping in some cases, so you can use CPU-Z (it's listed under "revision") to get the stepping.

Here is a shot of mine for reference:

If all else fails, look on the box your q6600 came in; the last 5 letters after the Q6600 in the production code will tell you the stepping. "SLACR" means it's a G0 while "SL9UM" means it's an older B3. Here an example shot taken by XtremeTiramisu to give you an idea:

So, I have a B3 w/ a VID of 1.2875v

EDIT: Here are the data as of 23-Sep-2007 at 7:30 AM based on people's replies to my VID thread here and elsewhere; just as a reminder, please do not post your VID from here on out as I won't be updating the data sets:

*Histograms generated with SBHisto

Total replies: 208
102 replies so far for B3 stepping Q6600s:
(VID: # of replies)
1.1625: 3
1.2125: 1
1.2250: 1
1.2375: 1
1.2500: 5
1.2625: 2
1.2750: 13
1.2800: 1
1.2850: 1
1.2875: 12
1.3000: 14
1.3100: 1
1.3125: 15
1.3200: 1
1.3250: 31

158 replies so far for G0 stepping Q6600s:
(VID: # of replies)
1.1125: 1
1.1520: 1
1.1625: 5
1.2000: 5
1.2125: 9
1.2150: 1
1.2200: 1
1.2250: 8
1.2375: 10
1.2500: 16
1.2525: 1
1.2600: 1
1.2625: 17
1.2650: 1
1.2700: 1
1.2750: 25
1.2850: 1
1.2875: 23
1.3000: 17
1.3125: 10
1.3250: 5

srtdodge05 · Jul 27, 2007

B3 @ 1.325v

pscout · Jul 27, 2007

I have 2 G0's from the same batch.

vids are 1.25 and 1.2375.

the one with the lower vid may be the better oc'er but reads much higher temps on exact same rig and hsf so better cooling or lapping might be required. They both run stable at 370x9, the lower vid one only needs 1.35v while the other needed 1.3625v to pass the same stability tests.
Those are bios settings on a p35-ds3r ... speedfan/easytune measured vdroop under full load was .1 v lower!

The higher one is now in a p5k vanilla and needing a much higher bios setting - 1.375v just to run @ 350x9 ... seems to have just as much vdroop as the ds3r but i haven't finished testing with it yet.

srtdodge05 · Jul 27, 2007

Im able to do 333X9 with 1.275v, i could go higher but for around 200mhz more i need voltage aroun 1.4 or more. I can boot into windows at 400X9 with 1.45v but i keep getting memory dump. pscout what are some of your settings in the bios on your p35-ds3r?

dfonda · Jul 27, 2007

Here is what stock cooling does.

Under the load of folding.B3 1.2750
Core-Temp.jpg

graysky · Jul 28, 2007

pscout said:
I have 2 G0's from the same batch.

vids are 1.25 and 1.2375.

the one with the lower vid may be the better oc'er but reads much higher temps on exact same rig and hsf so better cooling or lapping might be required. They both run stable at 370x9, the lower vid one only needs 1.35v while the other needed 1.3625v to pass the same stability tests.
Those are bios settings on a p35-ds3r ... speedfan/easytune measured vdroop under full load was .1 v lower!

The higher one is now in a p5k vanilla and needing a much higher bios setting - 1.375v just to run @ 350x9 ... seems to have just as much vdroop as the ds3r but i haven't finished testing with it yet.

This is interesting. Perhaps the lower the VID value scales across the o/c range. Clearly, we need more examples to make this statement.

graysky · Jul 28, 2007

srtdodge05 said:
Im able to do 333X9 with 1.275v, i could go higher but for around 200mhz more i need voltage aroun 1.4 or more. I can boot into windows at 400X9 with 1.45v but i keep getting memory dump. pscout what are some of your settings in the bios on your p35-ds3r?

This is good to know. Your VID is 1.325 and you need 1.275V to do 9x333... my VID is 1.2875 and I need 1.2625V in the BIOS (1.232V in CPU-Z) to do 9x333... perhaps there is something to a lower VID scaling across the o/c range.

Automata · Jul 28, 2007

graysky said:
This is good to know. Your VID is 1.325 and you need 1.275V to do 9x333... my VID is 1.2875 and I need 1.2625V in the BIOS (1.232V in CPU-Z) to do 9x333... perhaps there is something to a lower VID scaling across the o/c range.

...I'm pretty sure thats true :beer:

dfonda · Jul 28, 2007

Well thats good to know. Once I get my temps down from being as hot the sun...I should have a good OCer.

Pete, why do you blue star guys get the CPU's with the best ID's

Karnal · Jul 28, 2007

Im gonna display my noobishness, but what is the VID?

dfonda · Jul 28, 2007

Voltage ID(identification), which is not to be confused with actual voltage.

Its a value the Mobo uses to set a specific core voltage.

My VID and voltage.
VID 1.2750
Voltage 1.256v

pscout · Jul 28, 2007

dfonda said:
Pete, why do you blue star guys get the CPU's with the best ID's

Don't worry D, I get my fair share of dogs too

Just plain dumb luck that ncix had a sale last weekend and i delayed ordering long enuf that they were out of b3's by the time my order got filled i guess :shrug:

Karnal · Jul 28, 2007

dfonda said:
Voltage ID(identification), which is not to be confused with actual voltage.

Its a value the Mobo uses to set a specific core voltage.

My VID and voltage.
VID 1.2750
Voltage 1.256v

Thanks for filling me in.

pscout · Jul 28, 2007

Karnal said:
Im gonna display my noobishness, but what is the VID?

And further to df's reply ...

I never really paid attention to vids until now ... but these 2 new G0's came out of the same batch, and I noticed they have different vids.

So I guess intel sets the vid based on each chip's test results in the manufacturing/binning process.

If the chip will run with a lower vid, then a consumer who does not run oc'ed and uses default bios settings will run at the lowest 'intel stable' voltage yielding lower power consumption and heat production.

For us oc'ers, it gives us some guage of how the different chips vary. In my case, the one with the lower vid also reports the highest temps. Not sure if it is a poor surface on the ihs, or if the ihs is not installed as well, or the sensiing diode is different, etc . etc. Both cpu's were tested on the same rig and with the same hsf :shrug:

But the one with lower vid, also oc'ed stable at 350x9 with a lower vc (1.35 vs 1.3625) and the delta .0125V is the same as the delta in the vid's.

The one with the lower vid also seems to oc higher, at least in the v ranges i tried. I didn't go very far with it tho since temps were getting too high on air and causing instability.

Teh Governator · Jul 28, 2007

dfonda said:
Voltage ID(identification), which is not to be confused with actual voltage.

Its a value the Mobo uses to set a specific core voltage.

My VID and voltage.
VID 1.2750
Voltage 1.256v

Is the difference between the two values known as Vdroop?

treatmentx · Jul 28, 2007

Teh Governator said:
Is the difference between the two values known as Vdroop?

No. I had the same question not too long ago and looked it up on Wikipedia and read about vdroop mods. To my understanding it's when you set a particular volt in bios, does not actually "stay" that volt once you begin to run some kind of load. The voltage drops a certain amount, so in order to achieve stability you have to go to bios and set it at a higher volt for the voltage to stay at that particular level throughout a stability benchmark like Orthos. Sounds confusing.

Let's say you set voltage at 1.55vcore because you read on this forum that that's the stable voltage if you want to achieve 3.8GHZ on the particular chip, say a E6600, of week26 batch whatever. When you try it on your chip, you run orthos while watching the vcore, it will drop to 1.48vcore, and thus it will fail Orthos. So to STAY at 1.55vcore, you set 1.6vcore in bios, so when you run Orthos, it drops to 1.55vcore and you pass Orthos.

Hope this is right lol, probably should double check w/ Wikipedia etc.

jason4207 · Jul 28, 2007

VID is what your voltage is set to if you have it on default.

If a chip has a lower VID then perhaps it may be a better OCer or at least run a little cooler. When Intel tests each chip a VID is determined based on the results of the testing. The lower the VID the more stable the chip is at lower voltages. This results in lower temps, and perhaps a higher quality chip that can OC a little further.

Vdroop is when the voltage being provided to the CPU dips under load. In any circuit it can be difficult to maintain an exact voltage across a load if the load is changing. As the CPU starts drawing more power it is difficult for the circuitry in the MoBo to maintain the exact voltage. So under load the voltage being provided dips and this is bad b/c you have to raise the voltage in the BIOs to compensate. The problem w/ doing this is that you end up w/ a more heat at idle and are running at a higher voltage at idle than you would have if no Vdroop was occurring.

This is how I understand it. Someone correct me if I'm wrong.

treatmentx · Jul 28, 2007

I'm not sure about VID, I think that's the theory right now, but I don't think we have enough data/information to solidify that theory... ??? Or is it already accepted, I dunno?

Btw, welcome to the forums! =) I think this place has the fewest flaming/whining kind of posts than most other forums, which is why I've become a regular (least I'd like to think I'm a regular, hehe) on this forum.

MadMan007 · Jul 28, 2007

http://www.thetechrepository.com/showthread.php?t=126

A good indepth technical explanation of what vdroop is and why it's there.

orion456 · Jul 29, 2007

G0 @ 3.6, 1.4v (vid=1.2625), core < 50c, surface < 38c, Swiftech H20-220 water, P5K dlx, L723A765, 07/12/07

B3 @ 3.06, 1.35v (vid=1.2875v), core < 58c, surface < 35c, Swiftech H20-220 water, P5W DH, L644G066, 3/29/07

Q6600 owners... what is your VID?

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