Which is the right voltage?

[EarthBoy]

So how do I figure out the correct voltage on my Q6600? I set my voltage to 1.325 in the BIOS but it reports 1.264 in CPUZ at idle (6 multiplier), 1.2 with load (9 multiplier)

which is right?

 

[Ammocan]

I think that is what they call vdroop...

Noob overclocker here so don't take this as gospel...

I'm guessing, but if your max voltage is say.. 1.5 and you have 1.6 in your bios, cpuz might have 1.46. So... which one is the max you should be at. The Bios one or the one cpuz sees.... I'm going with what cpuz reports.

 

[BonzaiDuck]

The VDroop occurs between idle (when any voltage reading is higher) and load (which droops it to a lower value.) Somebody can correct me about any specifics on the matter of CPUZ, but I'm pretty confident this is what we're talking about when discussing vDroop.

 

[katank]

I believe you are talking about vdrop, which is between BIOS and windows idle (as measured by CPUZ), rather than vdroop which is between idle and load.

What I don't understand about EarthBoy's post though, is the reference to less multiplier. If the multiplier is lower than it should be, that sounds like a SpeedStep thing. Be sure to turn off all power saving options before messing w/ OCing, stability testing etc.

 

[PlasmaBomb]

Lower with less multiplier suggests EIST (speedstep) is enabled.

 

[EarthBoy]

Speedstep enabled, I see no reason to turn it off because my system is 9h prime stable.

The voltage my BIOS shows is 1.325, CPUZ shows 1.264 at idle and 1.20 at load. Which one do people refer to when they talk about their voltage?

 

[z1ggy]

You can turn it off if you want.. it just means you aren't get any OC unless you are under a high load. CPUZ will report that because your BIOS is controlling the OC and sees no reason to raise the mult. when you aren;t doing anything process intensive. I took mine off any auto settings because it lets me feel more in control.

 

[myocardia]

Vdrop (also known as Voffset) is the difference between what Vcore you set in the BIOS, and what your processor is actually receiving @ idle. Vdroop is the difference between the idle Vcore, and the load Vcore.

 

[EarthBoy]

Ahh I understand now.. but which Vcore do people refer to when talking about voltage? Vcore in BIOS or CPUZ (assuming CPUZ is reporting the correct voltage the processor is actually receiving)?

 

[Big Lar]

Originally posted by: EarthBoy
Ahh I understand now.. but which Vcore do people refer to when talking about voltage? Vcore in BIOS or CPUZ (assuming CPUZ is reporting the correct voltage the processor is actually receiving)?

Thats the problem, there is no universal standard so who knows? Also, it really depends what board you have too, as for instance, the DFI boards true vcore is in bios.

Larry

 

[BonzaiDuck]

The last time I visited this issue, which was last year with a 680i board and a B3 quad-core Q6600, I could see how the Speedstep feature could be an instability problem (and correct me if I'm wrong, but this is what I observed.)

The CPU is set to run at a certain multiplier and external-frequency (or what is known as CPU_FSB). The Speedstep feature works by dropping the multiplier, and the multiplier on any given processor below the flagship model will only be an integer value in a fixed range, the highest value being the default multiplier.

If you over-clock by lowering the multiplier and raising the FSB, the Speedstep feature may attempt to drop the multiplier below the minimum value. At least, this is the way I remember it, and I believe (and believing isn't knowing, and suspecting is between either one) -- that this explains it. So I "suspect" this to be the explanation.

IF SUCH IS THE CASE, then over-clocking with the stock multiplier may "play nice" with the Speedstep feature, anyway.

That's my take on it.

 

[LOUISSSSS]

Originally posted by: myocardia
Vdrop (also known as Voffset) is the difference between what Vcore you set in the BIOS, and what your processor is actually receiving @ idle. Vdroop is the difference between the idle Vcore, and the load Vcore.

can anyone confirm this?

vdrop = difference between Bios and cpu-z idle

vdoop = difference between cpu-z idle and cpu-z load

 

[Emo]

Originally posted by: LOUISSSSS

Originally posted by: myocardia
Vdrop (also known as Voffset) is the difference between what Vcore you set in the BIOS, and what your processor is actually receiving @ idle. Vdroop is the difference between the idle Vcore, and the load Vcore.

can anyone confirm this?

vdrop = difference between Bios and cpu-z idle

vdoop = difference between cpu-z idle and cpu-z load

Affirmative, except it's vdroop, not vdoop.