How to volt mod IC7 Vmem

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09-19-2003, 04:21 AM
general_rommel

I set the resistor to 0 Ohms to start off with and then tried it at 250 and there was no change in the problem
09-19-2003, 10:28 AM
BioBlade

could we do te mod without taking de r50 off ? just soldering a kind of resistor on top of the r50 ?

thanx already:p:
09-19-2003, 12:08 PM
johnrr6

Troubleshoot

Quote:

Originally posted by general_rommel
I just went down to the electronics store today and got them to do the IC7 VDIMM mod for me. Here is a link to the diagram i followed http://www.frontpage2000.family-net....is/Schem1a.jpg .

It was all looking good and the resistor and wires were all done correctly. I got it home plugged it in - after clearing CMOS and booted it up.......
No post..... I replaced all the components and tried again....
No post..... I removed it from the case and only used bare essentials plugged in.....
POST!! yay i thought - my motherboard isn't broken . But then i looked down and i realised that the leg i needed to ground wasn't grounded. So i shut down --> grounded it --> booted up again and.....
No post..... If i ground the wire while the computer is running it instantly freezes.

Does anyone know what could be going wrong?????

Any help would be appreciated

Maybe a short

Try a different ground.

Try 300 Ohm resistance

Check to make sure they used the correct resistors

Swap your Ram around

Go to post 181 in this thread and you can try the mod a bit different way-----you won't have to unsolder the wires from the board-----just the ones at the trimmer----you do not need the 10 Ohm resistor-----just the 1k Trimmer

Left side of R50 to Middle leg
Right side of R50 to either outer leg

This was the original method outlined by Fugger and it is stable up to about 2.95 - 3.0

Hipro 5's method is stable to 3.1 - 3.2 and eliminates the problem of sometimes no post at VDIMMs higher than about 3.0

Good luck------John
09-19-2003, 04:52 PM
general_rommel

Thanks heaps, but still no luck

I have tried 3 different grounds
I cannot see if its shorting - i think that i will just try the original method - however i was looking to increase VDIMM to around 3.2.
09-20-2003, 02:58 AM
PIRATA!

These methods are very good, but I would like to make a little VMod do have only about a +0.1V or at max +0.2V.
I would like to do this in the simplest way possible.
If I solder a 300 Ohm resistor ON TO the R50 resistor WITHOUT desoldering it, will I have the SAME resaults??

Thank you very much.
09-20-2003, 04:50 AM
johnrr6

No

Quote:

Originally posted by PIRATA!
These methods are very good, but I would like to make a little VMod do have only about a +0.1V or at max +0.2V.
I would like to do this in the simplest way possible.
If I solder a 300 Ohm resistor ON TO the R50 resistor WITHOUT desoldering it, will I have the SAME resaults??

Thank you very much.

No----resistor MUST be removed.
09-20-2003, 05:06 AM
general_rommel

My mod didn't work and to top that off - when i removed my mobo from my case the resistor fell off and took the solder pads with it.

From what people have said before i am going to connect the 4th leg of the windbond chip to a ground on the mosfet - and i am going to connect a resistor in here to increase the VDIMM to an extra 0.4V if its possible. I have no ellectronics experience - what resistor whould you recommend?
09-20-2003, 05:37 AM
PIRATA!

Re: No

Quote:

Originally posted by johnrr6
No----resistor MUST be removed.

Ok.. thank you.
Is there another kind of VMod that can avoid any desoldering stuff or the use of the trimmer??
I like the old fashion "static-resistor" way. :)

Thank you again.
09-20-2003, 01:39 PM
johnrr6

Re: Re: No

Quote:

Originally posted by PIRATA!
Ok.. thank you.
Is there another kind of VMod that can avoid any desoldering stuff or the use of the trimmer??
I like the old fashion "static-resistor" way. :)

Thank you again.

Not that I know of on an IC7------you can use SMD grabbers----but you still have to remove the resistor.

I understand you can do a VDIMM volt mod on the Asus P4C800-E Deluxe entirely without soldering or removing anything.

John
09-22-2003, 01:12 AM
PIRATA!

Ok!
And considering to remove the R50 resistor... will it be good to use a regular 300 Ohm resistor with the less tolerance possible??

Thank you.
09-22-2003, 05:02 AM
johnrr6

Guess you could

But I'd stick with a 1K Trimmer

Gives you flexibility for more voltage as increasing resistance increases voltage on this mod

Before you even solder anything-----use a mutimeter and set your resistance to 250-300 ohms on the trimmer

thats a good starting point

John
09-22-2003, 08:18 PM
general_rommel

I was just thourouly reading the posts and someone said that i can solder to the left leg of the resistor below R50 if the pit was pulled up. Is this true? because it is only the left side of the R50 that is missing the pit
09-25-2003, 02:04 PM
kingassasin

OK, I'am getting ready to try this thing and nervous as hell. I got and old sound card which has a gazillion little resistors like r50. Been de-soldering the hell out of em. Got a bald headed card now. What seems to be working the best is to use a pair of twessers pulling up on one side and heat. That side releases and the do the same of the other side. Every one on the test card came up leaving two shinny pads. I'am confused about "losing the pad or well". What happens and what would it look like if this happens?
09-25-2003, 07:12 PM
Underwater Mike

Simple: You won't see the shiny spot of solder.

In my experience, removing the R50 speck was not too tough, just tedious and needing a careful hand. Soldering on the new leads properly was what killed me.

Quote:

Originally posted by kingassasin
I'am confused about "losing the pad or well". What happens and what would it look like if this happens?
10-01-2003, 03:30 AM
Nohto

1 Attachment(s)

Does anyone know the value of the resistor just below the R50 resistor? I believe it is the MC64. See Pic
10-01-2003, 12:53 PM
hipro5

Quote:

Originally posted by Nohto
Does anyone know the value of the resistor just below the R50 resistor? I believe it is the MC64. See Pic

It's an SMD capasitor of about 100nF/16Volts+
10-01-2003, 06:21 PM
Nohto

Thanks Hipro. Changed out the resistor and modded the mem, for the 5th time, but no matter what I adjust the damm resistor to it doesn't change the vddr at all. WTF is going on? I have done this mod on a previous board with no problems, I am sure I am doing it right, but this damm thing doesn't work!!!!!! Any sugg? I am going to try Hipro's resistor and see if that helps any.
10-01-2003, 07:27 PM
Nohto

I finally got it. Didn't add the 10 ohm resistor. I just took a small needle and scrapped between each leg of the chip and around the resistor and cap. Must of had small amount of solder shorting something out. I used a jewelers glass and didn't see anything, but after that I fired it up and then dialed the vddr to 3.28. Time to put it back together slap the Promie on it and hope my 9800 is condensate proof enough to get some decent benches going.
10-02-2003, 06:11 PM
kingassasin

Well, I did it without any problems. Setting bios to 2.8 yields 2.99. Turned the vr up a little but not much. Ram will now run @ 274fsb @ 2-5-2-2 which the highest it would go before is 267 @ those timings. :toast:
10-19-2003, 04:33 PM
Snoozy

Anyone know what the radio shack part number for the 1K pot is? Or what its name is? I've been searching radioshack.com like crazy for this thing.
10-19-2003, 04:35 PM
Snoozy

http://www.radioshack.com/product.as...5Fid=271%2D280

Is that what I want?
10-23-2003, 07:16 PM
CATCH22ATPLAY

Eeek gads no. Don't use that pos unless you really want problems. I hope you got a Fryes close by. RadioShack parts are just not for me. But if that's your only choice well you can try this instead. http://www.radioshack.com/product.as...5Fid=271%2D342
10-27-2003, 09:44 AM
N803

okay... I'd like to give a little feedback on my mod...

First please note that my IC7-G is a version 1.1 and while I didn't think that would make any difference...

Taking off R50 was no big deal and since I had a few resistors "in stock" I didn't bother going out to get a pot. I ended up soldering a pair of thin wires to R50's pads cause it was so damn difficult to solder the resistor directly, which in the end turned out to be a good thing.

First resistor I tried was a 330 ohms. Post ok, but got a BSOD when WinXP came in. I made sure all BIOS settings were back to default and tried again... another BSOD. :mad:

So I thought 330 ohms was too much and tried shorting it - after all R50 was supposed to be a 0 ohm resistor, right? Well... as soon as I hit the power button it beeped pretty loud at me... :( At this point I thought I was screwed... the short didn't work...

Then I tried other values, including 10 ohms, all lower than the original 330 ohms I first used. Neither worked.

Since 330 ohms got me the farthest - almost into Windows - I decided to try a 390 ohms resistor just for the sake of it... and guess what... everything worked just fine... :confused:

So now at 2.5V in BIOS I get 2.75V in Winbond, but at least it's working fine at 240 FSB right now - my previous stable record. I haven't had much time to try higher overcloks yet, though, which I'll do tonight.

Can anybody explain to me what might have happened...?

Thanks,
10-27-2003, 11:27 AM
scifikg

Will these parts work for the Hipro method?

10 ohm surface mount resistor Part#RL12S10.0GCT-ND
200 ohm trimmer Part#CT94P201-ND
10-29-2003, 05:47 AM
hipro5

Quote:

Originally posted by scifikg
Will these parts work for the Hipro method?

10 ohm surface mount resistor Part#RL12S10.0GCT-ND
200 ohm trimmer Part#CT94P201-ND

Yes they will.......... ;)

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