Proth's P5WD2 Vdroop Ghetto MOD

[proth]

This mod is for those timid or over caffienated people that don't want to take a soldering gun to your mobo. This is no joke and works quite well. The goal is to lower the resistance of the Analog Devices droop circuitry from about 75k to 40k ohms. The PIC below has a "proper" vdroop mod, so please ignore the wires and pot which isn't required. Should be able to do this mod without removing the mobo.

Sharpen a #2 or any other soft lead pencil really sharp. Jam the tip of the pencil between Pins 17 and 18 of the Buck Boost converter/regulator. Rotate the pencil while applying slight downward pressure, then snap off tip of lead so it remains jammed between the pins. Low risk, should keep droop under 20 millivolts: Maybe FUGGER can make a GHETTO section, cause I have a lot of ideas on cooling and cases.

[X909]

Thanks for this easy mod! I' ve just done it, works fine...

[proth]

[barbapappan]

Nice mod! Beatiful actually since it´ll probably get someone to try ghetto.

I´m so addicted to this, it´s like the freeride category of modding. Just you and the hw and stuff not ment to go inside a computer. Not just replacing stuff with better preforming parts and (carefully...) putting together again. Ghetto is so underestimated... It´s the real deal.

Maybe FUGGER can make a GHETTO section, cause I have a lot of ideas on cooling and cases.

Go ghettosection now! And proth: keep up the good work!

[n00b 0f l337]

You could then add a drop of nail polish as well.

[3NZ0]

awsome, works wonders for my 930, which is much worse than my old 920.

[adeoliver]

This worked great for me till I replaced with the VR.

[I)ickie]

After doing the pencil mod what should the resitance between 17 and 18 be??? mine is 1.4kOhm isnt that a little low? Dont wanna power it up until i know.
I)ickie
p.s. this is with a p5nd2-SLI but it has the same ADP3181 so i assume it works the same

[cronic]

so thios WILL NOT work for a regular old P5WD2?


EDIT: YES it will

[toledo]

You could then add a drop of nail polish as well.

I guess it would lower the resistance too much . Right ?

[I)ickie]

It works on my p5nd2-SLI great. Just need a board with the adp3181. Of course the points for soldering might be diff. Correct me if im wrongt but you just need points with 0 resistance to pins 17 and 18. The pencil mod should still be the same. But check resistance before you boot because i had to do a fair bit of fiddling to get resistance between 20 and 30.
I)ickie

[greenwar]

Just to add to the list. I did this pencil vdroop mod on my P5WD2-Pre and P5LD2 both of which has the adp3181 buck controller. No vdroop in any of those mobos now. But my vcore now is set at least .1v higher than whats set in the bios. But thats no problem. I just reduced the vcore at the bios and both machines are happy campers now.

[JuanFlaiter]

But my vcore now is set at least .1v higher than whats set in the bios.

It happens with hardmods and ghetto mods

[Lestat]

sorry to ask this here, is there a pencil mod for the P4C800-E
im getting up to 0.07v droop and its killing my overclocking.

my P5WD2-E Prem does the same so i plan on doing the pencil mod to that, thats for sure!


one thing to remember guys is that pencil led when used for certain things such as this doesnt last forever. i mean i doubt it would degrade fast enough for any of us to see it happen but i just throw that out there for anyone who wants to know.
i have yet to see a properly done pencil mod go bad but it can happen.

[I)ickie]

one thing to remember guys is that pencil led when used for certain things such as this doesnt last forever. i mean i doubt it would degrade fast enough for any of us to see it happen but i just throw that out there for anyone who wants to know.
i have yet to see a properly done pencil mod go bad but it can happen.

I agree but the good thing about a pencil mod like this is its not gonna kill anything if it does.

I)ickie

[Lestat]

i have some pencils here but i cant tell if they are #2.

i put my DMM on OHM's and put the lead on in between the positive and negative leads of the DMM. the DMM then reads 0.02......
is this about right or should a #2 pencil read ????


someone do that and tell me.

i mean thats my understanding of checking for ohms. turn the DMM to the ohm setting and test whatever your testing. i know when i touch the + and - keads of the DMM together WITHOUT the lead between them the reading was way way higher, so i figure the lead is offering resistance. and 0.02 Ohm of resistance.

am i correct on this ?

sorry electrical stuff has always been a weakness of mine.

[proth]

That pencil should work fine. The P4C800 uses a different chip so the pencil mod will not work on it. My kid runs the P4C800 and it's been modded with a resistor, fixed the droop big time. There are a lot of PICS around on how to do this.

[Lestat]

proth i sent you a pm about what we talked about before

hey this whole pencil mod actually reverses the droop.
meaning

now instead of drooping the vcore INCREASES..... uhhh.... i'm not sure i understand how or why ?

idle its nice and steady though.

i was unable to actually break off the lead between the pins though cuz they are so close together so i just did the best i could.

not to mention the vcore is now 0.10v higher than what i set in the bios.
the bios is 1.35 the vcore in windows with every application i can find says its 1.45v or a little higher.

here are some pics

[fasttruck860]

I have a quick question about voltage readings. I measured my volts from the mosfet to the ground and got 1.25idle/ 1.15 load, but windows reads 1.45 solid. This is on a vdrooped P5WD2-P and P4 630 set to 1.37 in bios. Is that mosfet reading to far off? If so, then why? I just got done modding this board so I'm testing everything out.

[vanovich]

might be a silly question ,but where does one buy these lead pencils from?anyone wonna send me a small piece off one and nice finding there proth.

[cronic]

proth i sent you a pm about what we talked about before

hey this whole pencil mod actually reverses the droop.
meaning

now instead of drooping the vcore INCREASES..... uhhh.... i'm not sure i understand how or why ?

idle its nice and steady though.

i was unable to actually break off the lead between the pins though cuz they are so close together so i just did the best i could.

not to mention the vcore is now 0.10v higher than what i set in the bios.
the bios is 1.35 the vcore in windows with every application i can find says its 1.45v or a little higher.

here are some pics

I am experiencing the same thing, instead of dropping, it actually rises.

[TMM]

might be a silly question ,but where does one buy these lead pencils from?anyone wonna send me a small piece off one and nice finding there proth.

any pencil will work. The graphite in the pencil conducts electricity

[vanovich]

i tried it with the pencil and got some wird results. the voltage opped like0,1 from what i gave it .the drop under load is much better now .lets say im 1,4 in biose .probe shows 1.5 then when i load the cpu it goes to 1,52 which is ok .the thing is ,that befor ,the pc was stable at 5,2 mhz ,and now im barely stable at 5,1 . wierd wouldnt you say .

[Xiled]

I dont know yet, but I think it works on P5P800 Se to, I had big drops and now les with the mod... I tried this because the P5P800 Se has the same IC number.

[hot_fifty]

weird vanovich... Thats why I wont make the mod