How to volt mod IC7 Vmem

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Originally posted by FUGGER
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Check the 1K vr and set it to 250 ohms and connect the center pin to the contact pad closest to the winbond chip (doesnt ring as ground with continuity test to ground) and the ground pin you setup vr at 250 ohms to the ground pad or a ground of your choice.

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I did this mod last night, I soldered a VR from Pad closest to the Winbond IC to ground, (fan header)
It didn't work.
I had to solder one end of the resistor to the Winbond side Pad and ther other leg of my VR to the other R50 pad.

Can't just solder to the ground of your choice.

OPP

just did Vmod with a 270 ohm resister (except shows 255 on v meter once soldered on mobo)

..so top ddr v is 2.88 now

http://www.nemi.us/imup/abovesideresist2.jpg

Hi all,

Just done the mod for a friend of mine and was wondering whether the 2 mosfet located under the memory slots (circled in the following pic) are related to the Vdimm and hence give me Vdimm were I to use a multimeter on them?

Oh btw I hope Threedee don't mind me borrowing his pic :)

http://www.angelfire.com/electronic2.../threedees.jpg

Cheers.

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Originally posted by Pita^Norf
Oh btw I hope Threedee don't mind me borrowing his pic :)

Cheers.

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...not at all ..:toast:

Does anyone have measuring points for vdimm??
C

I`m going to do this mod, but with a resistor. I need to know what value to use on the resistor to reach 3.1V when set to 2.8V in bios? So if someone could messure what value they have on there vr when they have +0.3V on the Vdimm, would help me a lot :)

Gonna try this on a IS7, Pic's and resistors look the same isnt labeled r50 though, but it's the same. I'll let you know how it goes.

post pics if sucessful. :toast:

Ransom 250 Ohm is a good start. measure from there, go down in ohm to increase voltage

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Originally posted by FUGGER
Ransom 250 Ohm is a good start. measure from there, go down in ohm to increase voltage

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Is it not the other way around?

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Last note about this volt mod is that it is the opposite of other volt mods. Meaning if you increase the value on the VR (250 Ohm to 300Ohm) it will increase the voltage to the memory.

If I have to take out the motherboard 3-4 times to change the value of the resitor, it will take up much of my time. Something I don`t have. I need an increase of +0.2V to +0.3V, so does anyone have a value that gives me this increase? Then I would save a lot of time.

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Originally posted by RansoM
Is it not the other way around?

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Last note about this volt mod is that it is the opposite of other volt mods. Meaning if you increase the value on the VR (250 Ohm to 300Ohm) it will increase the voltage to the memory.

If I have to take out the motherboard 3-4 times to change the value of the resitor, it will take up much of my time. Something I don`t have. I need an increase of +0.2V to +0.3V, so does anyone have a value that gives me this increase? Then I would save a lot of time.

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As you can imagine no two boards are the same so the resistance required is different from one board to another, hence why it is more straightforward to use a pot/VR.

Also asking for someone to measure the reistance off their VR (that correspond to your voltage requirements) would involve removal of their board (not an option if you are phase change cooling), and then disconneting the VR from the circuit (board) to get you those measurements, and then you have to contend with the +- 10% accuracy that the VR's work with.

With this in mind I think you would understand why not many members have volunteered. :)

Just my 2 cents.

JCviggen

I had it soldered perfect, but as i always do, I just went over it again.


I used to hot of a slodering iron too, killed the pads, but when it came off a trace back to one of the legs came up with it. Luckely i noticed it and where it went.

Here's what it did since i killed my pads. I soldered from the fourth leg down on the chip where i put the red arrow, to a ground leg on one of the mosfets. Started it up and works fine. 290ohm resistor and getting 2.7 volts. @ 2.5 setting when i set it @ 2.8 i get 2.95, gonna try a bigger resistor.

So i got it working. Maybe you will have some luck bringing your friends board back to life you killed. Soldering to that leg takes a steady hand though!!!


This is on a IS7-e by the way, chips in the same spot but mosfets are moved.

The pic is from Hipro5 on page on, TY I'll take one later.

Best i could get my geil 3500 was 232 ddr, now it's up to 240 1:1 on this board. stable. and 300 @ 5:4 with a alpha heatsink.


http://mywebpages.comcast.net/tedind.../XFpics/06.jpg

Here, pics not the best, laid it on my scanner. Dig camera is over girlfriends house.

Tedinde,

Nice save !!

BTW do you know the Voltage points where I can measure Vdimm ?

Mosfets either side of R50 ?

Dont know the volt points, Just got back and it's still running @ 315fsb with F@H running.

I just put some clear silicon over my solder points just in case. It's in the vapo now running stable. I'll be putting some numbers up later in our intel forum. IS7 thread i started.

Tested @ 295fsb and was getting 6400 in sisoft. I'll be putting some pics up too soon as i can log into my comcast web page storage, seems to be down.

Unless the whole world is hitting my couple of beta bio's i put up hehe.!!!

Hey nice going Ted....Im glad you sorted it out...:)

If Im looking at your scanned pic correct, it seems you have have just done the mod by connecting some wires to the actual Wibond IC chip and not lifted any resistors?

Or if I read it correct, you couldnt actually use the resistor bit anymore so you did it the way in the pic above with the wires to the an ic leg on the WInbond chip?

Can you confirm this pls? Cos ure way looks way easier and I would prob do it that way with a grabber :D!!!

Cheers

:)

post a pic of the mod whenever you get your camera back..

No i took off the resistor, If you dont it will just stay grounded out. If you flip the board over, you will see that the right side of the resistor on the IS7 connects to the ground leg of the mosfet.

When i gave it too much heat, The trace on the board came up and was just hanging there with the solder pad, with a magnifying glass, i noticed it went back to the fourth leg down on the chip.

It's easy to desolder the resistor, then use the SMD grabber to the 4th leg down in my pic.

The only reason i had to do a second solder to begin with was i noticed i was touching the mosfet side with my wire, so upon desoldering my wire, i killed the pad.

Be careful, low heat!!!!! But if i had to do another i'd use the smd grabber, then if i had to make the board stock again, it's easyh enought to solder the zero ohm resistor back.

Still working fine By the way!!!!

So I take off the resistor with the solder iron.......and then just use an SMD grabber on leg4 of the Winbond chip as you have done......then run a ground wire from the leg of that mosfet to the anwhere on the case that will give a grounding?

Can I do it this way;

Lift the resistor off.......and then use my POT and wires I have already setup from the 9700 mod....eg red and black wire go to POT and the black wire goes to a fan header and the red wire to the 4th leg on the Winbond chip.....

If so then this is very easy :):)

I have a question, so besides from replacing a resistor with 200-300ohm the 0ohm resister, (the one that many pix have reported), i have to connect one end to the Leg4 of the Winbond chip??

Isn't this a 1 step only mod? Is the Leg4 mod for the VTT?


Last one, and how do the mesaure the voltages?

naughty_guy, nah Ted only did the leg cos he fooked his resistor pad or something up.....thats how I read it :)

afaik, all you do is replace the resistor as talked about, but it seems maybe ted has found a new way to do the mod, ala the leg4 etc :)

I think...:stick:
hehehehehe

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Originally posted by Creative
naughty_guy, nah Ted only did the leg cos he fooked his resistor pad or something up.....thats how I read it :)

afaik, all you do is replace the resistor as talked about, but it seems maybe ted has found a new way to do the mod, ala the leg4 etc :)

I think...:stick:
hehehehehe

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Yeah Ted had fuxored his solder pads and saved his board using his method. :thumbsup:

This is no criticism on anyone but personally I never use smd gabbers for any mod since there is always a risk of it working loose and shorting something......this is the last thing you need if you've left your machine running and not at home.

:banana:

I was able to successfully mod my IC7-G. I replace R50 with a 331ohm 0402 SMT resistor. I now can run my 2 sticks of 512MB Corsair XMS3500C2 at 2.85 volts instead of 2.75 (if I select 2.7 in BIOS). My voltage now goes as high as about 2.94-2.92 when I select 2.80 via BIOS. Awesome mod. It only took me about 5 mins, not including taking the system apart to get the motherboard out and getting it all back together. Total time, 30 mins.

-kjb

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So I take off the resistor with the solder iron.......and then just use an SMD grabber on leg4 of the Winbond chip as you have done......then run a ground wire from the leg of that mosfet to the anwhere on the case that will give a grounding?

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The two wires you see are off a old fan 3 pin connector so i can switch resistors by just plugging them in.

Just solder one wire to the 4th leg, and the other to a ground leg on the mosfet, or any ground on the MB, Screw hole works too.

Just about every mod on every board i did before this was to a leg on the IC chip to a ground, so this was no different.

Hey guys, thanks, so if i didn't fuxor up anything, then i just change the 0ohm resistor at the R50 place with a 200-350ohm resistor. But I would like to know how can i measure the voltage?? Where do i put the points and do i measure voltage when the motherboard is on?

Thx muchies