[Searching] NF7(-s) v2.0 Vdimm to 3,3V Rail mod

Hi.
I`m searching for a how2 for the abit nf7-s v2.0 vdimm @ 3,3V rail mod.
All i found here was a link to 3dmaxx.
A dead link ;(

google isn`t helpful too.

gonna be very happy if some1 can help me ;)

believe this is what your looking for, probably a good idea to verify the connection points with a DMM..

http://www.xtremesystems.org/forums/...chmentid=15518

BTW, welcome to Xtreme :toast:

thanks.

but well, i don`t understand the pic :confused:

what have i to solder where?

the 3,3V sense cable from psu to the green marked point on mobo?
and from there a connection to the the other end of the yellow line?

in german it will be much easier i think :rolleyes:


what exactly does the vdd booster?

for 3.3vio=vdimm mod you need to solder wire between two points:

3.3v supply for the mobo from underside of the ATX connector (as shown on the pic)
and
vdimm pin on the underside of the DIMM socket (in this case DIMM1)

it's very easy mod and you should have no problem with performing it.

ahhh, k

took a litle time for understandig.
i did not realize what pins are shown on the pic :brick:

i`ll better first try on my killed nf7-s before there is another dead one...


thx for help! :toast:

Make sure your VTT tracks, else the mod is useless.

Quote:

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Originally Posted by Torin

Make sure your VTT tracks, else the mod is useless.

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with 3.3vio=vdimm mod VTT tracks automatically.... no need to worry about that ;)

On every NF7-S?

Quote:

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Originally Posted by Torin

Make sure your VTT tracks, else the mod is useless.

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oh damn, i think i better install a translator program...

or maybe u can try to explain me what it means to track vtt?

am i right, that vtt means vdd= half times vdimm?


i wanted to make vdd mod with pencil

vtt = 1/2 vdimm

Print those photos, just for surety :)

Good luck with modifications

How does this mod force vtt to 1/2 vdimm? Does the vdimm=vio mod only cause vtt=1/2 vdimm on NF7 boards?

If you do the resistor VDIMM mod, as shown at motherboardfaqs.com, then VTT will not track. You will have to do the separate VTT mod.

If, on the other hand, you do the VDIMM=VIO mod as shown above, VTT will track without the separate VTT mod.

Quote:

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Originally Posted by mcnbns

If you do the resistor VDIMM mod, as shown at motherboardfaqs.com, then VTT will not track. You will have to do the separate VTT mod.

If, on the other hand, you do the VDIMM=VIO mod as shown above, VTT will track without the separate VTT mod.

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that's the holy truth!!! every single word :)

i`m looking forward to go up to 3,6V vdimm for my BH5 babys.
that means i will get vdd 1,8V
and thats really not enough
vdd should be 2,0-2,1V

(yes, it will be cooled good (about -35° water))

is it possible to mod additionally to the 3,3vrailvdimmmod the vdd with pencil up to ~2V ?

tracking vtt means that the vtt voltage changes corresponding to your vdimm. if vdimm = 3.6v, vtt should show as 1.8v. also vtt != vdd. vtt is a voltage that influences signal strength/stability of the memory (don't quote me on that, but it something around these lines), whereas vdd is the chipset voltage.
iirc there were mods shown on motherboardfaqs.com that dealt with vdimm, vdd and vcore. and i think they had the soldering & the pencils mods for all of those there. might want to check that out.

ok, did it.
pic1
pic2
pic3

it was really easy :banana:

tommorow the working nf7-s v2 will be moded too and i will torture my ram a bit :D

thanks 4 ur help :toast:

i did the mod, but it does not work.
pc won`t boot.
i cut the wire and it boots again.

have i to do the vdd booster mod too?

Booster is optional, but will be better if you do it...
You should have also vtt=vref..., but first pic is "lite" ;]
Here is "full" mod ;] http://downloads.modlabs.net/bios/pic/4th-Method.JPG If you do like this pic, everything should be fine :D

If it doesn't work, maybe you did solder wrong pins

VDD booster mod will not solve this problem

soldered exactly the same pins as on the pic...

what does the vtt=vref mod?

It's weird, Melchior

Can you use DDM and check if this ATX's pin have a voltage something around 3.3V?

By the way, if I/O=vdimm mod is used, there are no reasons to do vtt=vref mod,
because of fact, that vtt automatically sets to value = 1/2 vdimm

ok, it works.

without sense wire it does not work...

ok so the sense wire is the brown wire on the psu ?
Atm i have the normal vdimm mod with a potentiometer and it gives only max 3.03vdimm :(

Quote:

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Originally Posted by swissocer

ok so the sense wire is the brown wire on the psu ?
Atm i have the normal vdimm mod with a potentiometer and it gives only max 3.03vdimm :(

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3.03v dimm maxx??? my nf7-s gave me 3.06v (real) vdimm when i set it to 2.9v in the bios. hmmm, that's strange

yeah when i set it at 2.9vdimm it gives me max 3.03.... thats not even worth the normal vdimm mod so i would like to know if the psu must have this brown wire (i have a fortron 350watt) for the 3.3v to vdimm mod to work?

What voltages we use??? My friends is frightened to use high voltages in you NF7-S rev2... What the max voltage you use?

Quote:

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Originally Posted by Melchior

ok, it works.

without sense wire it does not work...

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Forgive the electrical newbishness, but what is a sense wire? I want to do the VIO=VDIMM mod myself, but I would like it to work.

What did you do differently the second time around?

the 3,3V sensewire is the brown wire of the psu.
it checks if 3,3V is stable.
if you put a resistor between this connection, the psu thinks the 3,3V rail is too low and pushes it up.
i reached 3,6V with 400ohm on my 800w wtx@atx server psu.


with a levicom 350w (without 3,3V sensewire) i got no boot.
switched psu to one with sensewire and it worked. so the sense wire is necassary.


putting 3,3V rail up to 3,6V i got 3,5V vdimm.
all depends on ram.
if u got bh5 then u can go up to 3,7V without a problem.


i hope my englisch isn`t too bad :(

I did the vio=vdimm modd yesterday :) works perfectly, even shows the actuall vdimm (3,48V) in bios :D managed some superpi @ 260fsb

sounds nice.

my nf7-s rev 2 even does not boot with 235mhz fsb @ 1,9VDD (nb watercooled)
everything over 210mhz is not primestable.

i don`t like the board ;(

dfi ininity did 244mhz stable @ 1,9VDD
even 260mhz to windows.

I don't know why but before I could get 265fsb superpi stable, not now. Think that it's the bios but not sure. Absolute max that board did was 274fsb. Not for long :P

Have you tried different bioses?

not yet.
got a xtra thread now.

gonna try out different things today...

Quote:

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Originally Posted by Karnivore

believe this is what your looking for, probably a good idea to verify the connection points with a DMM..

http://www.xtremesystems.org/forums/...chmentid=15518

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How high does the VDD booster raise to?

VDD booster does nothing. It is said not to hurt anything, but it doesn't help, either.

Anyone have he full 4th methoid pic? The link for it on the other page is dead. :(

Thanks.

Have a Happy New Year everyone! :toast: :banana4:

Quote:

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Originally Posted by Melchior

ok, it works.

without sense wire it does not work...

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Could you please make a diagram showing how to do it right cause i have the same problem

This may sound stupid but what voltage does the board default to with the 3.3v rail mod? (if the rail is at a steady 3.3v, not higher like 3.5-3.6v)

2.7v, but it is still recieving whatever is being supplied by the +3.3v rail.

here is an easier way of doing the mod that will supply better amperage and be easier to solder. All you have to do is scrap away some of the protective material on the bottom of the board below the mosfet where the red lines I have added go to. Two wires is better than one and this attachment location is probably better than the other one too since the power can still be filtered somewhat by the capacitors and such.

So u scrap away some material in the red area, but where do you solder the second wire then? I only see one silver dot in the lower left area(sorry for sounding noobish dont know the exact word). Do u also scrape some material of them?

side by side.

there are 3 wires that carry +3.3v from the PSU to the ATX header, so you could do 3 wires too if you wanted... just solder them all to that point where you scrape off the protective PCB coating.

could you use digital camera to show us where you solder these 2 wires?

Quote:

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Originally Posted by STEvil

side by side.

there are 3 wires that carry +3.3v from the PSU to the ATX header, so you could do 3 wires too if you wanted... just solder them all to that point where you scrape off the protective PCB coating.

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for me, i did the 3.3vdimm mod (dirty punk's way). I manage to boot my pc but the pc become unstable (always automatic restart, windows log error, sometime hang during loading windows) no matter what ram frequency and timing i set. what's the problem huh?

p/s: i'm using khx3200ak2/512 which based on ch-5 chip.

The two red lines are how I did it. I'll get a pic tomarrow if I have time to.

http://www.xtremesystems.org/forums/...chmentid=22449

my question is same as eR1k. I wonder how did you solder the another wire? which point you connect to?

Quote:

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All you have to do is scrape away some of the protective material on the bottom of the board below the mosfet where the red lines I have added go to.

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Typo fixed, scrape not scrap.

edit
http://www.xtremesystems.org/forums/...chmentid=22867
/edit

wow, do u solder that wire directly on the part of the mobo where you scraped away the pcb protective stuf

yes

Quote:

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Originally Posted by STEvil

Typo fixed, scrape not scrap.

edit
http://www.xtremesystems.org/forums/...chmentid=22867
/edit

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got a better picture? i cant see it clearly... sorry.

ok.. do you see the area circled in red under the green "3.3=vdimm mod2" in the picture above? The copper in that circle is attached to the output leg of the vdimm circuit, all you need to do is scrape some of the coating away that is on top of it and solder directly to it..

No, I dont have a better picture.

Quote:

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Originally Posted by STEvil

ok.. do you see the area circled in red under the green "3.3=vdimm mod2" in the picture above? The copper in that circle is attached to the output leg of the vdimm circuit, all you need to do is scrape some of the coating away that is on top of it and solder directly to it..

No, I dont have a better picture.

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could i connect the 2 wire in the same point , i mean the bottom left side one.

http://img.photobucket.com/albums/v2..._bot/abits.jpg

Yes.

That pin is connected to the light brown area just "below" it which is where I have soldered my wires to (have to scrape away the protective coating over that light brown area).

Be carefull not to contact the other pin next to it.

Quote:

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Originally Posted by STEvil

Be carefull not to contact the other pin next to it.

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But from the picture i shown, i tried to connect the 2 wire in the same point. Then above you say "YES", but you also say "Be carefull not to contact the other pin next to it" . So, what does it mean?

I mean, izzit i really can connect the 2 wire in the same point which shown in the picture without scrape away the protective coating area, just solder at the same point.

Yes, but that single contact point defeats the purpose of more than one wire because it is small and would limit current carrying capacity.


That is the reason I have done the mod as I did, so current can not be limited.

how about if i just connect 1 wire and what's the purpose you solder the 2nd wire?

http://img.photobucket.com/albums/v2...t/abits122.jpg

Will work fine.

The reason I used two wires is:

Quote:

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Originally Posted by STEvil

<snip> the purpose of more than one wire because it is small and would limit current carrying capacity.


That is the reason I have done the mod as I did, so current can not be limited.

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Use a wire similar in size to the one in the picture on the right.

Quote:

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Originally Posted by STEvil

Yes.

That pin is connected to the light brown area just "below" it which is where I have soldered my wires to (have to scrape away the protective coating over that light brown area).

Be carefull not to contact the other pin next to it.

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STEvil did you also do the vtt mode (if yes which one)?

no.

3.3 direct does not require a vtt mod.

STEvil does you way supply power to all three dimms. Does the dirty punk method as well. Thanks :D

It supplies it to the output side of the vdimm supply mosfet, which has a large trace to the DIMMs.

The Dirty Punk connection point goes to a single DIMM and relies on a small trace to supply needed power.

Connecting to the VDIMM mosfet output or the VDIMM capacitors (more than one!) are the best way to do it.

Thanks :D I need a vdd mod now. I havent seen one for rev 2.0, All the links to formentioned mod no longer work. Anyone want to point me in the right direction. Does the vdd booster shown in the picture increase vdd voltage or just stabilize it?

There is a Vdd mod here.
The Vdd booster is supposed to help stabalise the Vdd voltage, but I don't think many people have found much benefit from doing the mod.

mine wont even post with the VDD booster.

Hey i tried you mod STEvil it didnt work for me. No differnce in voltage. Which i find odd. Does it matter that my board is a plain NF-7? The punk method does however work, But unregulated voltage and fluctiuations under load isnt appealing to me. Thanks for all your help man. This means another log on the fire :D

Mine is also a plain nF7.

Mine and Dirty Punk's mods are 100% exactly the same except mine has higher current carrying capacity. Thats it.

Ummm can you take measurements showing the vref tracks without vtt=vref? I always remember needing it...

Already did.

Quote:

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Originally Posted by Tony420

Ummm can you take measurements showing the vref tracks without vtt=vref? I always remember needing it...

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Pin1 - Vref

http://www.xtremesystems.org/forums/...id=27792&stc=1

Pin2 - Vtt

http://www.xtremesystems.org/forums/...id=27793&stc=1

Pin7 - Vdimm

http://www.xtremesystems.org/forums/...id=27794&stc=1


Tracks quite nicely, If you ask me :D

EDIT: I just noticed that STEvil is talking about different way of doing VIO=VDIMM mod... Those photos above are taken with the NF7-S with "Dirty Punk's method".

Wow I've learned alot reading this thread.

Got a new NF7-S rev2 now (killed my other one, which was too bad considering the thought that it did 260fsb+) and when I start modding it for real I'll try your method STEvil instead of the Dirty Punk method.

I've just got one question, when done the Dirty Punk vio=vdimm does all of the dimm ports recieve 3,3V or just the first one? My belief is that all of the ports get 3,3V but a guy over at a Swedish forum made me wonder. It would explain why my card did a bit over 260fsb with the ordinary vdimm mod and about 250 with the dirty punk mod.

Thnx all :)

Yep, all DIMM slots are getting same volts when using VIO-VDIMM mod and one wire ;)

Hi,
I did THIS mod for my nf7-s Pict1 Pict2 and I started my pc, opened bıos, then ı set 200x8 to test for first time(ı used 3 switches for turning them on-off; i tried this settings while mods closed). I saved and reboot pc but it didn't opened again :cussing: :brick: I checked mods hundered times and all of them were set correctly,ı used silicone to protect them as well... What's wrong in this situation? Please help me :worship:

My system;
Abit nf7-s
xp 1.8+
2x512 a-data vitesta 500 mhz ddr
Gas cooling Cpu&Nb (-50&-30 on the gasblock)

Get rid of vtt=vref mod... It's not needed when vio=vdimm mod is done and can actually mess with your board if you have vdimm mod done above mentioned way. It's only necessary when "normal" vdimm mode is done.

Do that and report back, please.

The wire you used for the VDIMM=VIO is too small and too long, and the point it is connected to is not designed to carry high amperage.

The vdd booster mod doesnt work for me either, system will not post with it connected.

exactly, like STEvil says.
in other words, just leave vio=vdimm mod in place. the other two mods really do not help at all... just make things worse most of the time.

Hi everyone;
bachus_anonym and STEvil,today evening I got rid of all mods and I applied vio=vdimm with better wire; then ı connected gascooling and started my pc but it didn't work. I cut all of the wires however it didn't work.... :explode: :soap: :bsod: http://forum.donanimhaber.com/upfile...miley/bye2.gif

So, with no-mods it doesn't even POST anymore ? Damn bad news if so...

See if there's nothing shorted on the board. Check voltages...

I looked hundered times on the board, there is no burned point etc, when problem happened, there was no smell.... I don't know what will I do, I'm only smoking now....

Here some picts...
I know my bedroom is not tidy :D

http://server2.uploadit.org/files/Sh...untidyroom.jpg
I think my mobo will go to paradise http://www.darkhardware.com/phpbb/im...icon_angel.gif
http://server3.uploadit.org/files/Sh...uan-system.jpg
First Stage Vapor Phase Change Cooling Test (One hour ago)
http://server3.uploadit.org/files/Sh...n-temptest.jpg

Could be the bios is corrupt, or the vtt=vref mod killed it.

vtt = vref is the worst mod ever, i have always said that....do the cut trace or dont bother.

-CaT

Can somebody please post a FINAL results as to what is best to get ram voltage to 3.3v please, im getting way confused with everyones different opinion! :confused: thanks per advance! :D

NF7-S 2.0
2500+ mobile with 226w Pelt/Maze4
2x 512 Corsair BH5 Windbond :banana:
600w OCz PowerStream

Quote:

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Originally Posted by construct6_com

Can somebody please post a FINAL results as to what is best to get ram voltage to 3.3v please, im getting way confused with everyones different opinion! :confused: thanks per advance! :D

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If you wanna do it right, then do the vdimm mod as it is supposed to be done - here. You'll also need a modded PSU.

If Im using my 600w OCz Power Stream with ajustable rails, i just use a multimeter and up the 3.3v rail to 3.4v and do the mod as stated above correct? thanks for your help!

NF7-S 2.0
2500+ mobile with 226w Pelt/Maze4
2x 512 Corsair BH5 Windbond
600w OCz PowerStream

So the dirty mod using (1) wire from the the 3.3 line does not work? (with an adjustable power supply)

Its just i dont want to have to remove parts off the board and add resistors and stuff - dirty punk mod looks easy enough - but can i get a verification it works>? Can you use the OCz DDR Booster with this dirty punk mod? not that you would - just asking if you can boot it up with one once the mod is installed to the back of the mounted motherboard. Maybe if u boot up with th rheostat turned down??

- ANother question, when doing a mod like this using the straight 3.3 rail - does it ADD to the voltage the bios normally produces?> like if you have 2.7v set does it just go to 3.3 or add together? How can you boot up with less than 3.0 AFTER doing the dirty pumk mod without killing mod? thanks!!

<img src="http://i3.photobucket.com/albums/y95/pikil/pikil_avatar.jpg" alt="Image hosted by Photobucket.com">

Quote:

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Originally Posted by construct6_com

Its just i dont want to have to remove parts off the board and add resistors and stuff - dirty punk mod looks easy enough - but can i get a verification it works>? Can you use the OCz DDR Booster with this dirty punk mod? not that you would - just asking if you can boot it up with one once the mod is installed to the back of the mounted motherboard. Maybe if u boot up with th rheostat turned down??

- ANother question, when doing a mod like this using the straight 3.3 rail - does it ADD to the voltage the bios normally produces?> like if you have 2.7v set does it just go to 3.3 or add together? How can you boot up with less than 3.0 AFTER doing the dirty pumk mod without killing mod? thanks!!

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yup, u can use ddr booster together with this mod. but becareful, once u increase the vdimm, ur 3.3v rail will increased too.

once u did the mod, u cant set the vdimm in BIOS, u jz manage to do so via adjust the 3.3v rail. since u r using adjustable psu, that's not a problem for u.

I still dont understand - they add together? where would i change the overall volatage seting at - the bios will still show up to 2.9 (i believe) and once the mod is done it will be 3.3, how do i lower that after the mod? can you use the ddr booster for that....im trying not to use ddr booster because it takes away dual channel...i want to get to 3.3v but not at first, ive never pushed these sticks that hard and i want to do it slow...ya know? use the ddr booster to get to 3.3 on each stick, then do the mod, set 3.3 rail on psu to 3.4, boot computer, should be 3.3 vdimm right? :confused:

btw - i meant use the ddr booster to 3.3 to (test) the modules - then take it away and then proceed doing the mod/psu changes....

With the dirty punk method, the Vdimm will be exactly what the 3.3v line is set at and won't be effected at all by what the Vdimm is set to in BIOS.
I wouldn't suggest using the DDR booster with the dirty punk mod because once you set the booster to a voltage higher than your 3.3v line, you will be drawing a lot of current through the boosters MOSFETs (probably 30+ amps at full load), which the booster probably won't like ;)

Ok - I just recieved the DDR Booster...finally :mad: - newayz ...im havina tough time with this sorry :eek: Im going to test run the 3.3v using the ddr booster to verify that these bh5's will hold that voltage. After tests are ok i will perform the dirty punk mod on the board > question: I just hook up 1 wire right??? or should i do the other mod that is show in the pics??? At this point i would remove the booster....

The simplest way to do the mod is to do the direct link between the 3.3v line pin on the ATX connector and pin 7 on the Dimm slot (as shown here - ignore the Vdd booster mod - you don't need to do it)
The other mod which uses the capacitor connection instead of the connection on the Dimm slot, and will probably provide a more stable voltage.

Can anyone verify that the capacitor way is beter?> or beter yet, can anyone say they knew anyone that screwed their ram up by using the straight through dirty punk way? thanks for your help persivore

im fairly tempted to do this mod, its so much simpler in comparison to the standard Vdim resistor mod, im just thinking though, wouldnt it be possible to add a resistor in line with the wire between the 3.3 atx ping and ddr pin in order vary voltages to the ddr socket, ie. increase resistance slightly and drop the ddr voltage to like 3.1 or whatever?

Quote:

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Originally Posted by slunge

im fairly tempted to do this mod, its so much simpler in comparison to the standard Vdim resistor mod, im just thinking though, wouldnt it be possible to add a resistor in line with the wire between the 3.3 atx ping and ddr pin in order vary voltages to the ddr socket, ie. increase resistance slightly and drop the ddr voltage to like 3.1 or whatever?

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You can't use resistors to drop the voltage. The Vdimm supply needs too much current (15A+ with 2*512 sticks of RAM) which will burn a resistor very quickly, and resistors won't provide any regulation for the Vdimm, so it will fluctuate a lot.
If you want to get a voltage lower than your 3.3v line (unless you have a powerstream!), you need to do the standard mod with the variable resistor. IMO, its not any more difficult, and will probably provide a more stable Vdimm.

Well, I know there is all this good stuff about the Dirty Punk method, but I did the standard resistor mod with the vtt mod, and I get up to 3.2V stable, and I can still control it in the BIOS. I have it set to be about .3V higher than whatever it is in the BIOS. So if I drop down to 2.6V, i get 2.9V. 2.9V, I get 3.2V. I think this is a pretty good method. I don't know, guess I just have hesistation on bringing in the 3.3V line without it going though some filter caps and stuff. Or does this mod's power still go through the same circuits?

Either way, i suppose you'll get more voltage :P

did the atx to pin7 mod over the weekend, with a standard switch on the cable as well so it can be turned on and off without a problem...

so i got a choice now, 2.6-3.0 through the bios or flick the switch and have 3.3 to the ram :)

seemed to work without a problem but it hasnt fixed my inital ram problem though

nice vmod!
monna get that when i get my bios fixed =)