How to volt mod IC7 Vmem

1 more question guys can i use a 10k pot instead of a 1k pot so i wont need to go out and buy again.

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Originally posted by Vatt
I can't get the resistor off the board. How long do you guys heat it up? When I take off the soldering iron, the solder immediately hardens again and the resistor is again stuck.
Did you use pliers or something?

Also putting a wick against the side doesn't do anything for me. It doesn't suck op the soldering or anything.

And does someone have a picture how it is supposed to look after having taken off the resistor, but before soldering something new to it? So, a picture off the clean pads...?

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At first i was just heating the metal off with no wick or soldering vaccum. I tried to use a q-tip to asorb the heated material. I finally got tired of it and used a small screwedriver to break the top of the resistor. Then it gradually fell apart andi had perfect contact pads. I wouldnt recommend you using my technique.
:toast:

I did the mod and tried three different resistors. 330 - 390 - 470 ohms

I had vdimm volts up to 3.2v but I still couldn't raise fsb past 277.

I pulled my n/b fan off and put AS3 on it on the hs. I was able to run the first test of 03 at 280fsb. That 3.9 on my 2.8

I decided to w/c the n/b.

I got one of the D-tek chipset blocks and put it on tonight. I haven.t got the water hooked up yet. Maybe tomorrow.

I soldered my wires to the mobo so I could change resistor out easily.

I mounted the chipset block with homemade brackets. donebalp invented the brackets, i merely coppied his.

I don't want to hook the chiller up to the chipset right now. I fighting one hell of a battle with the condesation as is.:(



http://home.attbi.com/~rbmccall2000/...8/site1455.jpg

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Will a 10k pot 15-turn be alright for this mod

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That's what im using, the small radio shack blue one's.

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Originally posted by Tedinde
That's what im using, the small radio shack blue one's.

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It works no doubt, it's just that you are only ever really going to use the range from 0 - 1K, which I'm sure you'll agree won't give you adjustments as fine a as 1K pot will, since each turn of a 15 turn 10K pot equates ~ 600 Ohm cf to ~ 60 Ohm of a 1 K pot.

Vatt

Let the tip of the soldering iron pre heat the wick. Then breifly touch both sides of the resistor, just lond enough to melt the solder the wick should get most of it..

Now you won't be able to remove the solder totally but you can now place the iron on the side of the resistor and verrry(not a typo) gently push while its heating and the resistor will move.

You should have 2 very shiny spots where the resistor was. This is where you attach the pot for the vdimm adjust.

Yesssssss,

I did the Vddr mod! Oh man, this was my ever first mod and soldering job I ever did. That R50 resistor is tiny!
I used a tweezer (good english word?) to get hold of the R50 resistor and used some wick also.

One side came off absolutely beautifull, the other side was not so nice.

Then I soldered two wires to these incredible tiny spots and I was very nervous, being my first mod and all.
The wires are in place, but it sure is fragile. I'll bet that with a few touches the wires will come off again...


Anyways, I set the pot to 300 Ohms and put it next to IDE2 port. There was room for it, so I used some sealstring from the Prometeia to stick it to its place.

I started up, and it worked... :banana: :banana: :banana:
I have gained now 0.15v
So setting it to 2.8 will give me 2.95v
I can turn the pot clockwise and Ohm will increase and so will the Vddr.

Thanks to all the guys who shared this info with us :toast: :toast:

This is great... I will now begin vmodding everything I have starting with my Radeon 9800 :D :D :D

Some pics: (I probably used too much wire)
http://www.xs4all.nl/~rvat/vmod/vmod.jpg

http://www.xs4all.nl/~rvat/vmod/vmod_2.jpg

/edit: UPDATE
I have turned some more on the potmeter so it now gives me 0.25v more.
Now when set in BIOS to 2.7 this is what I got:
http://www.xs4all.nl/~rvat/vmod/mbm5_vmod.gif
So when setting to 2.8 I will get 3.05v and that's great.

Vatt, Excellent job man, im goin to the mod with a pot now. Ill update u guys on if i fugger up my board.

Ok guys i tried the mod with a 10k pot-15 turn. Center pin of the pot goes to the pad closet to the winbond chip. The pin at the top goes to the other pad. I tried booting but no bios and nothing on screen. Should i be turning the pot adjustment screw. I did not adjust the screw head. What can be the problem.

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Originally posted by NyCUndaGrounD
Ok guys i tried the mod with a 10k pot-15 turn. Center pin of the pot goes to the pad closet to the winbond chip. The pin at the top goes to the other pad. I tried booting but no bios and nothing on screen. Should i be turning the pot adjustment screw. I did not adjust the screw head. What can be the problem.

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NyCUndaGrounD,

You have missed a vital step in this mod.

One of the 1st things you do is adjust the pot to 300 ohms !!!

If you had continuity between the pot and the board, then I'm afraid you have just put 5000 ohms worth of voltage through your Ram (is there vdimm regulation that limits the max vdimm??). Why 5000 ohms you ask ? Well afaik pots come from the factory adjusted to 1/2 of its max resistance and in your case 1/2 of 10K is 5K.

This is one reason why I advocated a 1k pot because even if you'd missed the vital step as I've pointed out then at worse you would have put 500 ohms of voltage through your ram, and these I believe are would be well within 3.2v vdimm.

Remove one of the legs from the board, adjust pot to 300 ohms and re-solder that leg to the board and hope that your ram and board is ok.

Yep, make sure the VR is set as well as had the bios already set to the lowest setting. make sure you have the solder conacts perfect too.

My ATX power connector has been having a problem, and prevents my system from booting from time to time. I have to unplug it and plug it back it back in for my system to boot. seems strange but worth a try.

Man I want to do this so bad. I only have an 8RDA+ vdd mod under my belt as soldering experience, but that board was under $100. I just don't know if I am prepared to flush $160 down the drain atm. Just no money to replace burnt hardware. I am loving this setup and would have to wait a while if I f'ed this up. I am not so woriied about soldering the resistor on as I am worried about getting R50 off and fuggering up the pad's. I really don't want to put my amd stuff back togther!;)

Man I might just have to take the shot. I need more vdimm!! I feel like a crack head trying to score!:o

BTW guy's thanks for the step by step instructions.

Thanks guys, i guess ill go to my local radioshack tommorrow. I have more free time now since off from college. This should be the life.

ohohohoh! VMEM GOODNESS! I love you guy's!!

Just booted up after preforming this mod, and to my delight everything worked! I still need to dial the resisotr a little. I am at 2.7 right now, which is giving me 2.8 I had set the resistor for 300 ohms.

I tell you though it took forever to get r50 off. I was so worried about melting the pad's. I had gone out and picked up a 15/30 Soldering Iron from Rat Shack cause I thought my other one might be too hot. I am just so glad everything worked, cause I really didn't want to put my amd rig back together. Intel has brainwashed me!

Thanks again guy's.

Yes i finally finished it. Got a 1k Pot from Radio Shack and im very happy with the results. I get 2.99 volts when i select 2.5v in bios.
i think i should lower the pot to a safer volatge ratio.



:toast:

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Originally posted by NyCUndaGrounD
Yes i finally finished it. Got a 1k Pot from Radio Shack and im very happy with the results. I get 2.99 volts when i select 2.5v in bios.
i think i should lower the pot to a safer volatge ratio.



:toast:

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WTG :thumbsup:

I'm glad it worked out for you !!

hmm. I turned the pot up some and when at 2.8 I was getting 3.05 but it was really squirly. Funny thing is I turned it down about a 1/4 turn and I was getting the same reading, and is still abit squirly. Maybe that is the max vddr I can get?

It would be great if some of the pro's could post some pics of the Vtt mod.:banana:

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Originally posted by LikwidKool
hmm. I turned the pot up some and when at 2.8 I was getting 3.05 but it was really squirly. Funny thing is I turned it down about a 1/4 turn and I was getting the same reading, and is still abit squirly. Maybe that is the max vddr I can get?

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wtf is "squirly" m8?

Just asking cos like another chap in here, I couldnt get the Mod to work. :confused:

Having said that, I am making further investigations (edit* my multiMeter may be fugged), as I`m sure PitaNorf would like to know! He's costing me a fortune in beer! :D

Congrats on your success for doing your MOD, but I'd like to ask what FSB increase you have got from your 3500 Mem for giving it an extra .2v over Stock max?

Pls expand your dedscription of "squirly" tho,....dying to know! :hehe:

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Originally posted by Kin Hell
wtf is "squirly" m8?

Just asking cos like another chap in here, I couldnt get the Mod to work. :confused:

Having said that, I am making further investigations (edit* my multiMeter may be fugged), as I`m sure PitaNorf would like to know! He's costing me a fortune in beer! :D

Congrats on your success for doing your MOD, but I'd like to ask what FSB increase you have got from your 3500 Mem for giving it an extra .2v over Stock max?

Pls expand your dedscription of "squirly" tho,....dying to know! :hehe:

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I can have a stab it it....maybe he means that his voltages are fluctuating ?

Yeah Kin Hell m8 I'm puzzeled as to why your mod has'nt worked, I feel a little guilty getting you to order those pots only for it not to work.

Anyways lets hope your multimeter was fuxored and you get the little bugger to fire up with the mod in place. :)

Good luck and may the overclock gods shine on your board :D

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Originally posted by Pita^Norf
I can have a stab it it....maybe he means that his voltages are fluctuating ?

Yeah Kin Hell m8 I'm puzzeled as to why your mod has'nt worked, I feel a little guilty getting you to order those pots only for it not to work.

Anyways lets hope your multimeter was fuxored and you get the little bugger to fire up with the mod in place. :)

Good luck and may the overclock gods shine on your board :D

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I'm only going on feelings atm m8. I guess I'd guess myself as being a pretty "Logical" type of a chap, so...I'm gonna be sure my meter is registerin right by setting the Cerement pot and whipping it round to a place that do circuit board work. Just to explain the need for this, I bought the Meter back in 1980. Was at college then, U can Gesticulate the rest ureselves! :D

So,...there could be a pretty good chance "Old Faithful" could be fuggin' me! :stick:

gonna check it out tommorow hopefully. Will let u know soon!

Cheers bud! :cool:

sorry Kin hell. Squirly was supposed to mean fluctuating. My bad!
Also I have not had time yet to test in 1:1 ratio. I tried to see how hi it would go 5:4 but it seems I am at the end of my 2.4c's legs at 289fsb. I need to try some things out. I could only get 285 before, so the mod did help a bit.

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Originally posted by LikwidKool
sorry Kin hell. Squirly was supposed to mean fluctuating. My bad!
Also I have not had time yet to test in 1:1 ratio. I tried to see how hi it would go 5:4 but it seems I am at the end of my 2.4c's legs at 289fsb. I need to try some things out. I could only get 285 before, so the mod did help a bit.

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No need to be sorry dude but thanks! :)

Also, have you Modded ure NorthBridge? A decent Heatsink & Fan with some Artic3 could allow you to go further still.

Good luck!;)

Yeah I have a Zalman heatsink with the stock fan on top with AS3 underneath. I just need a day off to do some more oc'ing. I will post results when I have them.

Thanks to you guys I have finished this mod.
I replaced the 0Ohm resistor with a 331Ohm one (IC7-G).
It works perfect. At 2.55 selected in bios it will actually give me 2.75. Didnt try any higher yet.

Funny thing is this.
I have done one motherboard first and it worked perfect.
Then I did my friend's one. He would get a blank screen and no post. We replaced the resistor (the 331Ohm one) with a new one, thinking we might have given it too much heat. Same result. No display at all. What I have done then, is I shorted the 331Ohm resistor with some twizers therefore giving it a 0Ohm value.
I got post. I removed the twizers not post.
In the end what I have done is I put another resistor (331Ohm) ON TOP of the 331Ohm already on the motherboard. I solder it in parallel. We turn the PC on - POST!!!!
Now with this mod, he gets only half the voltage from the normal mod eg. 2.55 selected in bios actually gives him 2.67 real volts.
He was happy with it as he already thought he had to spen $$ for a new motherboard. Plus in the end he still gets more than the 2.8 limit.

So 2 identical boards, two identical mods but only one of them worked. I think the components used on the boards and their tolerances play a big part in modding the vdimm. I am now sure that if I had a 400-450Ohm resistor around and would have actually solder it to my friends board will have worked giving him a bit better than just 0.1 increase over the value selected in bios.

Maybe this info can help the guys who cant get a post after the board has been modded. Try solding one to the motherboard and one on top of the resistor. At least you will get more than the defualt max voltage in the end.

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Originally posted by MnM
Thanks to you guys I have finished this mod.
I replaced the 0Ohm resistor with a 331Ohm one (IC7-G).
It works perfect. At 2.55 selected in bios it will actually give me 2.75. Didnt try any higher yet.

Funny thing is this.
I have done one motherboard first and it worked perfect.
Then I did my friend's one. He would get a blank screen and no post. We replaced the resistor (the 331Ohm one) with a new one, thinking we might have given it too much heat. Same result. No display at all. What I have done then, is I shorted the 331Ohm resistor with some twizers therefore giving it a 0Ohm value.
I got post. I removed the twizers not post.
In the end what I have done is I put another resistor (331Ohm) ON TOP of the 331Ohm already on the motherboard. I solder it in parallel. We turn the PC on - POST!!!!
Now with this mod, he gets only half the voltage from the normal mod eg. 2.55 selected in bios actually gives him 2.67 real volts.
He was happy with it as he already thought he had to spen $$ for a new motherboard. Plus in the end he still gets more than the 2.8 limit.

So 2 identical boards, two identical mods but only one of them worked. I think the components used on the boards and their tolerances play a big part in modding the vdimm. I am now sure that if I had a 400-450Ohm resistor around and would have actually solder it to my friends board will have worked giving him a bit better than just 0.1 increase over the value selected in bios.

Maybe this info can help the guys who cant get a post after the board has been modded. Try solding one to the motherboard and one on top of the resistor. At least you will get more than the defualt max voltage in the end.

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http://www.charlesleach.fsworld.co.uk/Pics/jawdrop.gif