Droop Mod for IS7-E, IC7, etc...

[Rio71]

hi,
i using this mod for long time on my is7-e rev1.2.
i picked up an ic7 and mod it too.
the mod is not really needed, but... xtreme

the mod works for the Intersil ISL6556B
simply connect an vr 20k (or higher) between FB (12) and VDIFF (14)

attention and findings:
- bevore first boot up make sure the vr is turned to the max settings.
- with lower resistance, droop is smaller but vcore rising... watch out...first slow an than faster and faster... turn slowly
- on ic7 the mod works a bit better, load=idle is possibly, on is7-e the droop are smaller but not idle=load
- the original (unmodded) droop on is7-e is higher as on ic7.
- this mod worked not ok on max3.. read the posts..

... i can't find it on hipro5's aiw. :p:


http://www.rio71.de/forum/droop-mod-is7-e-ic7.png

http://www.rio71.de/forum/droop-mod-is7-e-ic7.jpg

[enzoR]

THANKS!

[bh2k]

omg my is7-e has been dying for a mod like this my vcore jumps like a mother. I can't thank you enough for finding this mod <3 you.

[Fisk]

so this mod works fine with the ic-7 max3 :) ?

[enzoR]

:doh: ;) :toast:

[Fisk]

:D

[Learn]

just finished the mod, it work great :toast:
IC7 1.0

[bh2k]

hmmmm, I couldn't get my Trimmers to go exactly to 20k 18.9 I believe. How much overvolt you think that would do?

[Rio71]

18,9k makes a very small difference to 20k.
on ic7, for idle=load my setting is around 5,0k
i recommend 20k for save beginning, is7 and ic7 are not identical and have differences between board to board.

turn it down and watch the vcore.
for heavy load im using prime95 or burnk7 etc. or burnmax ...
try an multimeter if you have, hw-doctor is not so correctly.

[Learn]

Originally posted by bh2k
hmmmm, I couldn't get my Trimmers to go exactly to 20k 18.9 I believe. How much overvolt you think that would do?

20k 1.775v bios

it droop a bit less than stock.
adjust it for the best voltage.

i'll add vcore caps, i think.

http://learn.chez.tiscali.fr/divers/2004-06-24-01h43-VoltCore.gif

http://learn.chez.tiscali.fr/divers/2004-06-20-15h02-VoltCore.gif

damn, my english :D

[Rio71]

20k 1.775v bios
with 1,525v default setting ? ... raised up so much ? :eek:

my ic7 is rev1.1, but difference should only be bigger nb-cooler.
have here an rev1.0 too, but not modded yet... will try.

[The Stilt]

So if I set 1.368V Vcore from bios, and I want it to stay there under load (zero droop), how big resistor do I need? I´m using IC7-Max3 mobo, and 3.2E prescott.

100k ohm probably would be safe enough, for starters?

Thanks

[Rio71]

i dont know about the max3.
i think 5k could be the sweet spot for this board too.
100k is to much, especially for this low setting 5k and finding the point.
find it out for us, and keep us updated. :toast:
but begin with the 100k, i made it also for trying the mod first.

[Learn]

Originally posted by Rio71
with 1,525v default setting ? ... raised up so much ? :eek:

my ic7 is rev1.1, but difference should only be bigger nb-cooler.
have here an rev1.0 too, but not modded yet... will try.

yes, it's for testing this 3.0C (sold now)

i've also used an IC7 1.1, some mosfets change ( one used for the "5v rail vddr mod" ) and other perhaps ?

[Rio71]

hi,
i receive mails and pm's with questions about the mod on ic7-max3.
i have no max3 and can only guess this ISL6556B-mod should working too.. sorry.
any successfully mod working here ??
please post it.. :toast:


LorD ClockaN, my setting for best working are
- is7-e around 4 kohm
- ic7- around 5 kohm
i assume the sweet spot for the max3 is near ... but i dont really know..

MC_ilker, tja, genau da liegt das problem..:D

[freecableguy]

Yeah...I did this on a IC7-MAX3 but ended up removing it. It would raised Vcore while lowering the droop. Even with the lowest setting in the BIOS for Vcore I was not able to set the droop to a small value AND keep Vcore low. The correct answer is probably a set of VR's as this resistor is most likely part of a gain circuit and changing to the change the droop is also adjusting the Vcore gain.

[Rio71]

thx
seems to be the mod ist not so good working on max3 like on is7-e and especially on ic7.

[Hilppa]

How much can you overcolt with this droop mod? If i get 1.65 vcore max. with prescott without the mod, for example?

Anyone know how to make a mod for vcore with IC7-G?

The Stilt gave me a tip to connect the 10th pin from the same chip as mentioned in this thread to ground through a 50kohms trimmer, but it only ended up booting the board as I connected the ATX-cable.

Need more vcore, help, anyone?

[Hilppa]

Just did the mod and it increased vcore 0,1-0,15 volts ;)

[bh2k]

Yea, I noticed a bit over overvolt with the mod as well.

[CaTalyst.X]

It looks like this mod would work for the DFI LanParty 875 Boards as well, because they use the same vreg, ill give it a try sometime.

-CaT

[Hilppa]

Seems like nobody really knows a VCORE mod for this board :( Glad the droopmod slightly increases vcore.

[bh2k]

Why would you need a vcore mod anyways?

[Hilppa]

Because the best I can get out of the board for my 2.8A is 1,65V, and it need something like 1,75 V for optimal performance with LN2 :D Anyway, I now know how to do the mod..

[hipro5]

First of all , I don't measure drop on the VCore of the IC7 series mobos......

EVEN at 2.1VCore when I measure with a multimeter - let the Winbond hardware monitor indicates what it wants(that's totaly faulse) - I found in Idle and at full load , NO DROP at all......

Now in case that someone wants the VCore mod of the IC7 series go H E R E........ (http://www.xtremesystems.org/forums/showthread.php?t=28553&page=10&pp=25) ;)

Thanks..... :)

[Hilppa]

Awesome, thank you Hipro :banana:

[Rio71]

First of all , I don't measure drop on the VCore of the IC7 series mobos......
oh, interesting! seems to be the differences between board to board are not so small as i guess. your board ist different to mine, mine to learn's...

you have "good" board('s), he :) .... thanks for posting your findings.

[Shadrag]

hipro5: Can you confirm if there is no actual droop on IS7 series of boards? You only mentioned IC7. My IS7 shows a large drop under load, greater than .1v, but if this is just a fake report, then I won't worry.

Maybe someone who has done the mod can try to measure actual voltage and see if the mod is doing anything?

[hipro5]

hipro5: Can you confirm if there is no actual droop on IS7 series of boards? You only mentioned IC7. My IS7 shows a large drop under load, greater than .1v, but if this is just a fake report, then I won't worry.

Maybe someone who has done the mod can try to measure actual voltage and see if the mod is doing anything?

Did you measure it with a multimeter..?.......coz the hardware monitor shows shi(f)t........ :)

[Shadrag]

I haven't measured with a multimeter. I would if I knew what points on the board to use for cpu voltage.

[hipro5]

There are 4 big rounded coills near the CPU's socket.......You can measure on any one of those..........Beware coz they are covered with varnish.......You have to measure at the end of them - the spot that they are soldered on the motherboard to the CPU direction - ......... ;)

[Mr. Tinker]

I think I'm not "using" my droop mod on my IS7 correctly. Right now BIOS asks for 1.55v, and then the trimmer drives it up to 1.58v. I still get the exact same amount of droop. Should I set BIOS higher and make the trimmer bring it back down, or will that even work with resistors in parallel?

[enzoR]

u cant make the trimmer bring it down.

[Mr. Tinker]

So what's a good trimmer resistance and bios cpu voltage setting combination?

[BB mods's]

I know this is old but can some one confirm for me that thit mod is OK for my ic7 max3?

[Navig]

Well, guess its a little late:

IC7/Max3 droop mod with an offset voltage by woutertal. (http://www.ocforums.com/showthread.php?t=342409)

I've been running this for a while and it works like a charm. Takes a little setting up with rebooting and all, but you can dial in any droop (even positive droop) that you want.

navig

[BB mods's]

TY, I got the V core mod done tonight, gona make a cap board for all the extra cap's ill be adding.Fired it up tonight with nothing but the cap mod to the NB on, worked great untill my woman desided she wanted to pick the cap up..broke the little brown guy it was attached to..then left it for me to fix..damn women,Put a new one and and re did the cap mod and fired it up, it postd fine so all is well,I guess ill do some more mod's later on this week if i feal up to it (retarded cold :( )

[pancake]

this mod also works on lanpaty pro 875b have just done itset to 1.4725 in bios overvolts to 1.48-1.5 running 2 instances of prime it stayed steady at 1.472 that was set at 20k will try going lower and see what it overvolts then

[TH€_BR@!N]

hello,

this mod works not good..

Sys:
ic7 max 3, Bios 1.8 / VTT/Vdimm fix / Droop mod
P4 3,2Ghz EO default 1,345v (i use 1,3875)

The problem:

with mod-
i have use a 50k Poti @ 19,98k

idel: 1,34
dual prime: 1,28

without mod:
idel: 1,38
dual prime: 1,34


witch make i wrong?


sry my english is bad. :stick:

[Rio71]

hello,

this mod works not good..

Sys:
ic7 max 3, Bios 1.8 / VTT/Vdimm fix / Droop mod
P4 3,2Ghz EO default 1,345v (i use 1,3875)

The problem:

with mod-
i have use a 50k Poti @ 19,98k

idel: 1,34
dual prime: 1,28

without mod:
idel: 1,38
dual prime: 1,34


witch make i wrong?


sry my english is bad. :stick:
mmm... seems to be the mod worked not ok on the max3. :(
anyway.. i tested the mod only on ic7 and is7-e.
like the others max3'ers posts here.. better mods are known. :D
i add an attention-info on first post. ;)

[TH€_BR@!N]

NO !

this mod works on IC7 Max 3!!!!

But only from 1,5v -----> 1,7v vcore (or more)

this mod dosnt work correct 1,3v -----> ~1,5v vcore

I have test it with 3Ghz D1 Nw (1,5v-1,7v)

Today i have 3Ghz E0 Prescot (1,3v-1,4v)

I need hlp.

@ Rio
Bin aus deutschland kannst du dich mal bitte bei mir melden ICQ oder email? Habe dir bereits PM geschickt.

[kryz]

Did the mod yesterday on is7 , works perfect :D :rehab:

I just have to get an is7-E for myself :D

[oRIDDLERo]

My DMM showed a .05 droop under dual prime load On my ic7-g, I have successfully cut my load droop down to .002 or so using a variation of this mod.

[Shadrag]

Anyone who's going to do this mod should measure their cpu voltage with a multimeter like hipro suggested. I finally got around to doing it and found that there was no droop (on my IS7-E).

When set at 1.7v in the bios, the idle in windows is as high as 1.68v and the load can go as low as 1.58v, but with a multimeter is shows up around 1.72v under load! That's quite and overvolt.

So everyone should check their actual voltage before they potentially overvolt their cpus by a large margin.

[kryz]

Which program do you use in windows ?

[Shadrag]

I usually use MBM, but also check with the AbitEQ. They both report the same for me.

[kryz]

Maybe the droop mod has a bad influence on the diagnostic chip :D

[Shadrag]

Just to be clear, I have not done any droop mod, I'm saying that there is no droop, so my board does not need any mod. The mod may actually screw things up if the board is correct to begin with.