vDrop and vDroop?

[twjr]

These two words seems to being used more and more these days. I was wanting to clarify some things. From what I've gathered vDrop is the voltage drop between the voltage drop between what is set in bios and the idle voltage in windows. Then vDroop is the drop between idle and load voltage in windows right?

Currently I have been having some big issues with these trying to overclock my Q6600 on my P35C-DS3R. When overclocked to 3ghz and set to 1.325v in bios the vDrop is about .07v and vDroop is .03v. At this speed and voltage my cpu is perfectly stable but trying to push it to 3.6ghz I have stability problems due to the big voltage fluctuations. At 3.6 I set my voltage to 1.45v in bios but with drop and droop it is nowhere near stable in windows.

So I've been getting the upgrade itch as I want a motherboard which can keep up with my cpu. More that can keep up with the power it needs. So that comes to my real question which mobos out there are good and which are bad when it concerns vDrop and vDroop?

Cheers

 

[EarthwormJim]

My DFI LT P35 T2R has almost zero vdroop.

What type of power system does your motherboard have? For overclocking a quad I'd really only look at 8 phase pwm or better motherboards.

 

[bryanW1995]

Originally posted by: twjr
These two words seems to being used more and more these days. I was wanting to clarify some things. From what I've gathered vDrop is the voltage drop between the voltage drop between what is set in bios and the idle voltage in windows. Then vDroop is the drop between idle and load voltage in windows right?

Currently I have been having some big issues with these trying to overclock my Q6600 on my P35C-DS3R. When overclocked to 3ghz and set to 1.325v in bios the vDrop is about .07v and vDroop is .03v. At this speed and voltage my cpu is perfectly stable but trying to push it to 3.6ghz I have stability problems due to the big voltage fluctuations. At 3.6 I set my voltage to 1.45v in bios but with drop and droop it is nowhere near stable in windows.

So I've been getting the upgrade itch as I want a motherboard which can keep up with my cpu. More that can keep up with the power it needs. So that comes to my real question which mobos out there are good and which are bad when it concerns vDrop and vDroop?

Cheers

I believe that your definitions of vdrop and vdroop are correct. Are you running the latest bios? I have a Q6600 on an ip35e, 1.52 bios, 1.44 after vdrop AND vdroop combined. .08-.1v is very normal for a quad, just bump up your vcore in bios to ~ 1.50 and see if you're stable then. You might also need a bump or two to vtt and/or mch.

 

[bryanW1995]

Originally posted by: EarthwormJim
My DFI LT P35 T2R has almost zero vdroop.

What type of power system does your motherboard have? For overclocking a quad I'd really only look at 8 phase pwm or better motherboards.

what cpu do you have in your dfi? some mobos have vdroop control, though I read an article at AT a few months back that led me to believe that a little vdrop/vdroop is a VERY good thing.

edit: and I don't have 8 phase on my ip35 pro and DEFINITELY not on my ip35 e. I've only been going a few months so far with seti running 24/7, but so far so good.

 

[twjr]

Originally posted by: EarthwormJim
My DFI LT P35 T2R has almost zero vdroop.

What type of power system does your motherboard have? For overclocking a quad I'd really only look at 8 phase pwm or better motherboards.

I believe the 'lesser' Gigabyte mobos have a 4 phase digital pwm, but don't quote me on that.

 

[twjr]

Originally posted by: bryanW1995

Originally posted by: twjr
These two words seems to being used more and more these days. I was wanting to clarify some things. From what I've gathered vDrop is the voltage drop between the voltage drop between what is set in bios and the idle voltage in windows. Then vDroop is the drop between idle and load voltage in windows right?

Currently I have been having some big issues with these trying to overclock my Q6600 on my P35C-DS3R. When overclocked to 3ghz and set to 1.325v in bios the vDrop is about .07v and vDroop is .03v. At this speed and voltage my cpu is perfectly stable but trying to push it to 3.6ghz I have stability problems due to the big voltage fluctuations. At 3.6 I set my voltage to 1.45v in bios but with drop and droop it is nowhere near stable in windows.

So I've been getting the upgrade itch as I want a motherboard which can keep up with my cpu. More that can keep up with the power it needs. So that comes to my real question which mobos out there are good and which are bad when it concerns vDrop and vDroop?

Cheers

I believe that your definitions of vdrop and vdroop are correct. Are you running the latest bios? I have a Q6600 on an ip35e, 1.52 bios, 1.44 after vdrop AND vdroop combined. .08-.1v is very normal for a quad, just bump up your vcore in bios to ~ 1.50 and see if you're stable then. You might also need a bump or two to vtt and/or mch.

There is a more recent bios but it is still beta.

I guess it doesn't really matter what I set my voltage to in bios as long as what the cpu is actually recieving is 'safe' it shouldn't matter. On that note what is safe actual voltage for a Q6600? When I next get a chance I will set the voltage to 1.5 and put +.2v through fsb and nb and see what happens.

 

[EarthwormJim]

Originally posted by: bryanW1995

Originally posted by: EarthwormJim
My DFI LT P35 T2R has almost zero vdroop.

What type of power system does your motherboard have? For overclocking a quad I'd really only look at 8 phase pwm or better motherboards.

what cpu do you have in your dfi? some mobos have vdroop control, though I read an article at AT a few months back that led me to believe that a little vdrop/vdroop is a VERY good thing.

edit: and I don't have 8 phase on my ip35 pro and DEFINITELY not on my ip35 e. I've only been going a few months so far with seti running 24/7, but so far so good.

X3210 at 3.6ghz. I do not have the anti-vdroop control enabled.

vdroop is a good thing to have, since it keeps you from overvolting your cpu. However if it's undervolting too much, that's not a good thing. Some boards are better at predicting/supplying the correct voltage than others.

I had two MSI P35 Neo (4 phase PWM) boards die on me while overclocking that quad within 2 hours. PWM failure on them. Was not a ridiculous overclock either, 425mhz fsb at 8x mutliplier.

Could have been bad contact though on the heatsink, just two boards failing in exactly 2 hours seems odd.