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

[Melchior]

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

[Karnivore]

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

[Karnivore]

BTW, welcome to Xtreme

[Melchior]

thanks.

but well, i don`t understand the pic

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


what exactly does the vdd booster?

[bachus_anonym]

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.

[Melchior]

ahhh, k

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

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


thx for help!

[Torin]

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

[bachus_anonym]

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

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

[Torin]

On every NF7-S?

[Melchior]

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

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

[Tonic]

vtt = 1/2 vdimm

Print those photos, just for surety

Good luck with modifications

[cetoole]

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

[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.

[bachus_anonym]

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.

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

[Melchior]

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 ?

[sky]

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.

[Melchior]

ok, did it.
pic1
pic2
pic3

it was really easy

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

thanks 4 ur help

[Melchior]

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?

[Swider]

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

[Tonic]

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

VDD booster mod will not solve this problem

[Melchior]

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

what does the vtt=vref mod?

[Tonic]

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

[Melchior]

ok, it works.

without sense wire it does not work...

[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

[sky]

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

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