AN7 vdd-mod?

[magma]

The dfi vdd mod didn`t work for the an7.

[Hell-Fire]

Well, I have not worked on an AN7....but I will see what I can dig up on it.

Please post a pic of the area around the AGP slot.

[twiggy]

I'll get some pics for you in a min.

[Hell-Fire]

Nice..thanks.

[twiggy]

Check out the pics in this thread. http://www.xtremesystems.org/forums/showthread.php?s=&threadid=23042&perpage=60&highlight=AN7*&pagenumber=6

I gotta upload these pics I took cause they are friggin huge but kinda crappy(light source sucked). I'll throw up the links to them shortly.

[Hell-Fire]

It will take time to look thru that thread and figure out what is going on.

It is either pin #2 or #6...but not sure which at this point. It all depends on which pin is the error amp for the Vdd circuit.

I will also need someone to take some resistance and voltage readings once I get a nice high res pic of the area around the AGP port and that LM358 chip.

I am heading to bed for now and will check this thread first thing tomorrow morning to see if pics are available and to read that thread over.

[twiggy]

Man these pics are crap! Here are a couple of around the AGP slot. 2048x1536 res
http://linxworld.org/nickpics/AN7.JPG
http://linxworld.org/nickpics/an72.JPG

I will get better ones sometime today for sure.

[magma]

-->

[magma]

*PUSH*
:banana:

[spaceman]

Now is this for the Northbridge? I know I'm a total n00by when it comes to voltmods. ;) I was able to copy the one for the 8RDA+, awhile back, but had to look at the pics a few times. I'll definitely be watchin'. :)

[Hell-Fire]

Whats on that 8 legged IC (4 legs per side) between the FETs and the capacitors that are under the AGP slot?

Also, could you post a more broad picture so as to include the NB in it?

[sky]

linky (http://www.abi02.de/deepblue2k2/hardware/an7/preview.html) to a preview page with a bunch of pics i took this afternoon. the ic you're looking for is displayed in this (http://www.abi02.de/deepblue2k2/hardware/an7/images/1196%20xxl.jpg) picture. i didn't insert it here for its 2048x1536 and would blow some people's bandwidth. all pics available as thumbs are 800x600 - if you need any one of those in a higher resolution, pm me and i'll put 'em up. only 2 pics at the bottom of the page (text links have full rez - i can go higher if need be)

anyway, what i make of the ic you're looking for is this:

1st line: LM358
2nd line: 34M (got some logo on there aswell)
3rd line: D3EX

cheers

[Dekal]

What's the difference between VDD and VTT anyway??
I think i'm searching for a VDD-Mod for Abit AN7. :)

[twiggy]

Sorry I've been gone so long, sick like a mofo:sick:. Anyhow I'll take some pics right now.

[twiggy]

Urgh... I just remembered I let me sister borrow my cam and she wont be back for 7 days.:(

[Hell-Fire]

Originally posted by Dekal
What's the difference between VDD and VTT anyway??
I think i'm searching for a VDD-Mod for Abit AN7. :)

Vdd is chipset/nb voltage, and Vtt is to be 1/2 of Vdimm.

Someone please take a voltage reading on pin #1 and #7 and let us know which is the Vdd reading? Obviously compare that to the setting in bios and reading in bios to make sure you arent reading AGP voltage.

[Dekal]

Thx for answering my question. I have a nice Multimeter and can read voltages, but i'm not sure where to read. Where can i find pin #1 and pin #7? Can i hurt my mainboard by doing that? :rolleyes:

[tictac]

Have u guys figure it out yet... ?

If havent... measure all the voltages spot that i shown in this pic.. i need all voltages...

[Dekal]

Here are all voltages you wanted. The box shows the voltages of the LM358 in the middle of the picture.

http://dekal.kalytta.com/images/abit%20an7/an7%20(1).jpg

[Hell-Fire]

The readings on pins #2 and #3 make me think this is either the AGP or Vdd voltage.

Jump in bios and change the settings for Vdd to see if the voltages change on those pins and on the FET leg where you got the same reading.

Let me know what you find out.

I would wager a guess that this is Vdd and not Vagp as the Vagp is usually around 1.5-1.6v stock.

Set the Vagp to 1.5v if possible and Vdd to something like 1.7-1.8v to see where you can match those readings on the LM358 and the FET leg.

[tictac]

Cheers :cool:

[Dekal]

First, i have measured all voltages with 1.60 VDD. Then i have tried the pencil trick, but it don't work for me at all. Maybe i need other pencil? I used one with HB 100. But anyway, it must suceed, because i have penciled it maybe 5 times again without sucess. Always i have measured the same voltages.

[Dekal]

And here is the new picture.

<img src="http://dekal.kalytta.com/images/abit%20an7/an7%20(2).jpg">

[tictac]

should be the same as DFI vdd mod.. :confused:

both board use LM358

[Dekal]

It seemed it can't be used for AN7, tictac. :(
How can i increase voltage of the right fet in the picture without damaging mainboard?

[tictac]

Originally posted by Dekal
It seemed it can't be used for AN7, tictac. :(
How can i increase voltage of the right fet in the picture without damaging mainboard?

here i show u how... solder 10K pot shown in this picture... but make sure to cut th trace 1st before u try this 1... Set the pot to maximum resistance... and lower the resistance to get higher vdd

:banana:

[rufsen]

Have anyone tried it out yet? Would damn like to know if so! Wanna go higher than 1.75 cause I can only do 220 @ 1.75 and 215@1.70 so I really think that the VDD is tha problem for me.

[magma]

Has to be absolutely cut there? Why?

[magma]

double post *

[A-38]

There must be another way, cutting the traces on my motherboard is not an option.

In stead of cutting the trace by the 'G' it should be better to remove the 0k resistor to the upper left of the 'G' since it's directly connected to the lower right leg (output 3.48v) on the LM358.

Or maybe we could unsolder and bend up the left pin on the mosfet to the right and solder the 10k pot on to it, then it shouldn't be nesseseary to cut the traces.

I'm NOT in to electronics this is purely n00b thinking, but does it sound like somthing that would work???

[tictac]

there is other way if u dont want to cut any trace on ur board

we can by pass the vdd voltage from vdd mosfet

just solder a wire from the source to output leg......

u can use pot to adjust the desire voltage...

GL....

[A-38]

Not sure what you mean, would you post a picture that shows it all?

[tictac]

Originally posted by A-38
Not sure what you mean, would you post a picture that shows it all?

here like this.... :banana:

[A-38]

Ah that seems fairly easy, I think I'm gonna' try it out when I get me a 10k pot.

[tictac]

if u dont use resistance just a wire connecting 2 points there... u will get about 2.4V something like that for vdd

so choose
good pot to lower that voltage..... to your desire voltage :)

[A-38]

I think I'll try a fixed resistor first, how many ohm's do I need to get about 1.85-1.9v VDD?

[tictac]

u need to test that.. i didnt know exact ohm for that voltage... :)

[A-38]

Ok then.
Well thx a lot for your help!!!

[A-38]

I measured the voltage on the 'back' side of that mosfet and it seems that there issn't any voltage there.
So as far as I can figure out this mod wount work!

[tictac]

r u sure... :-/

[A-38]

Thats strange I was unable to measure any voltage there yesterday but today it says 2.57v.

Well are you sure this mod wount burn anything? cuz then I'm gonna try again.

[A-38]

Well tryed out the mod and it didn't work no matter how low the resistance on the pot meter was the VDD voltage stayed at 1.73v

[Dekal]

Aren't there any changes @ right mosfet (right pin) if you solder the pot? I think there have to be higher voltage on mosfet. What about the LM358? Doesn't 2 voltages (1.71) @ right pins of LM358 differ with pot?
Maybe we can't change VDD with that method...

[tictac]

the source is @ 2.57V..... maybe yor pot is not lower enough...

coz 2.57V should overwrite vdd voltage easily if the pot resistance is low enough... try smaller pot... :)

[A-38]

I used a 10k pot and got down to about 1.5kohm and then thought things wouldn't work.
I'll try again sometime during this week!

[magma]

FU** ---> Kills my 255 Fsb Board ;(

[tictac]

Originally posted by magma
FU** ---> Kills my 255 Fsb Board ;(
why do kill her :stick:

[magma]

with that cut trace isn`t good.
my new does not go however better, although it is newer.

[tictac]

then connect it back... the board will live again :)

[AdvModDev]

Originally posted by Hell-Fire
Well, I have not worked on an AN7....but I will see what I can dig up on it.

Any progress? I'll be getting one of these boards next week...more VDD is the only mod that's really required. There's certainly enough Vcore (2.3V) and Vdimm (3.2V). But the VDD is only 1.75V, WTF?

O/T

I found the VDIMM mod for this board:

http://www.vr-zone.com/Shamino/an7vmod/pics1/1.JPG

http://www.vr-zone.com/?i=759&s=1

Hell-Fire, can you confirm this? The guy says to remove resistor R316 and replace with a 1K VR set to 0 and increase for more voltage. Does the resistor have to be removed? Why not just solder the VR directly to the resistor? Also, does this board need the VTT mod like the NF7? Can someone post a pic w/ all the voltage measuring points for this board?

[A-38]

Well no prgress on my part, didn't get the bypass mod to work :-/

[Dekal]

Originally posted by AdvModDev
Any progress? I'll be getting one of these boards next week...more VDD is the only mod that's really required. There's certainly enough Vcore (2.3V) and Vdimm (3.2V). But the VDD is only 1.75V, WTF?

O/T

I found the VDIMM mod for this board:

http://www.vr-zone.com/Shamino/an7vmod/pics1/1.JPG

http://www.vr-zone.com/?i=759&s=1

Hell-Fire, can you confirm this? The guy says to remove resistor R316 and replace with a 1K VR set to 0 and increase for more voltage. Does the resistor have to be removed? Why not just solder the VR directly to the resistor? Also, does this board need the VTT mod like the NF7? Can someone post a pic w/ all the voltage measuring points for this board?

I have tried to pencil R316 (lower resistance) to get lower DimmVoltage, but it doesn't work at all. Maybe it will work with removing this resistor and change it with higher one.

[skate2snow]

Dont be scared to remove it. You just have to heat it up a little, and take a plier to take it off during that you have the solder the end....

[tictac]

ok here:

http://www.hwtweakers.net/files/forum/0407/foto_023__1090838224_thumb.jpg

[Dekal]

Originally posted by tictac
ok here:

http://www.hwtweakers.net/files/forum/0407/foto_023__1090838224_thumb.jpg

:rolleyes: :) :D

extrem is it ...

[CaTalyst.X]

Originally posted by skate2snow
Dont be scared to remove it. You just have to heat it up a little, and take a plier to take it off during that you have the solder the end....

You coudl take the pad with it pretty easy doing it that way, just heat up one end and push the iiron towards the SMD resistor, it will start to lift, do this for both sides and it will pop off.

Some1 should try vtt, it should be pretty easy for this board, it will probably work similar to the mod on the abit A64 boards because it uses the same vreg, ill post more info later, if some1 could get a pic of the DIMM slots and above the dimm slots (top right of board) that would help out alot.

-CaT

[CaTalyst.X]

Sry for the double post in advance but i dont want to confuse ppl :P

Will somebody set vdimm to 2.8V and check the voltage on pin 7 of that winbond monitoring IC. It should be Vtt sense, just want to confirm it, and if i get a pic of the top right corner of the board we will have vtt :D

-CaT

[EDIT] What do you guys think about this for the Vdd mod?

http://www.savepic.com/freepicturehosting/is.php?i=221131&img=an72.jpg

[Dekal]

Originally posted by CaTalyst.X


Will somebody set vdimm to 2.8V and check the voltage on pin 7 of that winbond monitoring IC. It should be Vtt sense, just want to confirm it, and if i get a pic of the top right corner of the board we will have vtt :D

-CaT


Why set to 2.8V? Where is that pin 7 on Winbond monitoring? I will measure that voltage...

[Dekal]

Have you tried out that mod you showed us?? :D

[CaTalyst.X]

No i dont have an AN7. :D

oh and u dont have to GND to that LM358, in fact a better ground would probably be easier and better.

-CaT

[Dekal]

Originally posted by Dekal
Why set to 2.8V? Where is that pin 7 on Winbond monitoring? I will measure that voltage...

Do you mean that Winbond monitoring chip that sits between CPU-Socket and memory slots? I will measure voltages, but must know more about your plan. I can't measure without any info... ;)

[CaTalyst.X]

Pin 7 on this IC, and probe all the other pins too if u can :D

http://www.savepic.com/freepicturehosting/is.php?i=221733&img=1f.jpg

-CaT

[Dekal]

Measuring voltage of that winbond chip is impossible! It is to small... Sorry there is nothing to do for my part. :mad:

[TheBis]

Originally posted by tictac
ok here:

http://www.hwtweakers.net/files/forum/0407/foto_023__1090838224_thumb.jpg


That's my board!!!!!

Hhehhhhheheh....

That's mod is usefull, but is good for stable voltages, but you can't rise Vdd....

This is my thread on an italian forum...

Link: (http://www.hwtweakers.net/postt3324.html)

I have experience some Vdrop on Vcore at high frequency and this mod can stabilize it!

Cya and if you need information for capacitor ask me!

[tictac]

Can anyone measure the voltage i mark with blue color ;)

[Ridex]

So if I do a Vdimm-mod on the AN7 3.3 V is the highest I will get?

[CaTalyst.X]

Ridex that chip is not that small, all i need is pin 7 please try just clip ur black DMM lead to ur case and rest the red lead on pin 7, then boot up the comp and after u get a voltage (doesnt have to be exact but close) take the red lead off and youll be fine! :D I really need some1 to measure those voltages :/

-CaT

[Ridex]

Originally posted by CaTalyst.X
Ridex that chip is not that small, all i need is pin 7 please try just clip ur black DMM lead to ur case and rest the red lead on pin 7, then boot up the comp and after u get a voltage (doesnt have to be exact but close) take the red lead off and youll be fine! :D I really need some1 to measure those voltages :/

-CaT
Sorry, don't have anything to measure with right now, a friend has my multimeter...

[Dekal]

CaTalyst.X: The Multimeter of my brother is really to big to get one small pin, sorry.

The following measurment i have done:
http://dekal.kalytta.com/images/abit%20an7/an72c.jpg

[AsSuLuTo]

Well erm, my AN7 is running at 240FSB with CH-5, need more juice to get 250MHz as im at 3.2v already on the vDimm...however I found out something fairly interesting regarding vDimm volt modding today, the vDimm runs from the 3.3v rail on most motherboard, and this usually means the board will max out at about 3.2v naturally and will have problems going any higher, so would it not be easier modding the board to use the 5v rails rather than the 3.3v rail with some form of potentiometer in place to keep the board safe...I think this is something like what the OCZ memory booster does...worth a shot though

[CaTalyst.X]

You could solder the +5V line straight to the source of the Mosfet, but thers no guarantees it wouldnt shoot 5V into ur PLL or SB. (not good)

-CaT

[AsSuLuTo]

No but if you were to do a mod like that guy with the ASUS pentium board (cant remember the model) where he made the vDimm run off of a seperate 5v rail so ONLY the RAM got the 5v, he also then went on and chopped up an old motherboard and used it as a regulated power supply for the RAM or something. I know you've seen it Cat.X because you were posting in the thread the guy made (not sure of the forum though)

Would that not be possible here?

[A-38]

Has anyone had any luck with the chipset volt mod yet?

[TheBis]

HEY MAN!!!

I can say to you all that you want about voltages on An7....

I really intersting about Vchipset Mod....

I hope that someone can help me to find the VDD MOD...

Cya!

[Dekal]

Sorry for the failure of not showing any pictures. There was a harddisk crash on server. I don't know when it will be fixed. If you want this pictures to be shown here, then i can pm it to anyone who wants to host it.

[CaTalyst.X]

Has any1 given my mod a try, or at least checked continuity. Comon guys, we cant do it all :D

-CaT

[twiggy]

Wheres DDTUNG?! He used to be the vmod masta. WHERE ARE YOU DD?!?! :D

[Malves]

Try CaT's way. You may get lucky....or not!

[l00b3r]

any news?

I wanna get my board pumping, but cant untill i find an AN7 VDD mod :(

-Matt