Vdimm/Vcore mod for MSI K8N Neo2 PLatinum-54G Edition S939

[FX Freak]

i´m searching a vcore and a vdimm mod for the msi k8n neo2 S939?
has anyone the board modded?

[Hell-Fire]

Please post pics of the board.

[Speaker4theDead]

I also want to know. I'm not going to vmod it but I want to measure the vdimm from the board. I am using a ddr booster but the board does not report the vdimm voltages correctly, thus i want to measure using a multimeter. Unfortuantly I dont have a good enough photo to upload.

Cheers

[Hell-Fire]

Check any FETs around the dimm slots....I sure there is one there reading Vdimm.

[LaserEdge]

I have been playing with the K8N Neo2 plat I have here most of the day. I have spent most of my time working on the memory subsystem figuring out how to get the dual channel frequency to atleast DDR500.

Right now I fail goldmem at DDR466 with 1 - 4 failures per hour. I have tried everything and the only thing that works is going from 1T to 2T. That indicates to me this board needs a Vdd mod.

So I went exploring with my Flukes and I have figured out how to do the Vdd mod. It is pretty much exactly the same as the K8N Neo Plat mod. I will try it tomorrow in the morning as I don't like doing Vmods when I am tired. Vdd is measuring 1.66V currently on my board.

I have confirmed 3.3V rail to Vdimm mod works well on this board. Vtt tracks nicely after the mod. This hasn't net'd me any additonal gains with my 3700EB thou because of Vdd problem.

Good test points for Vdd and Vtt are next to DIMM slot 4. Use EC1 for Vdimm and CB30 for Vtt.

[Razor_cut]

I’m going to receive this board tomorrow, and have any of ya figured out how to make a Vcore mod?

LaserEdge-> did you have any luck with the mods?

Eager to know =)

[kyosen]

Check this pic, please.
Left-side FET generates Vddr, and right-side FET regulates/supplies
drain-voltage from Vio.

This Vddr circuit is similar to K8T Neo2's one, but not same, I think.
I've already found feedback line of Vddr and drain-voltage to CoreCell,
and probably 2 pattern-cuts are required for obtaining over 3V Vddr.
If upto 3V is enough, 1 pattern-cut is enough...

I also use DDR-BOOSTER with K8N Neo2.
It's enough for me, but I intend to modify this Vddr circuit just for fun

[kyosen]

Check the attached image

> This Vddr circuit is similar to K8T Neo2's one, but not same, I think.
> I've already found feedback line of Vddr and drain-voltage to CoreCell,
> and probably 2 pattern-cuts are required for obtaining over 3V Vddr.
> If upto 3V is enough, 1 pattern-cut is enough...
--
The prediction above was partially correct and partially not correct
K8N Neo2's Vddr circuit is almost same as K8T Neo2's one.
This mod(step1) gives upto 3.2V in case of Vddr=2.85V setting@BIOS.
In my experience, Trcd=2 setting@BIOS gives lower Vddr(2.7V, without mod),
so set Trcd=3 or Auto and use A64Tweaker, or use CoreCenter please.
Many thanks to CodeRed!!!

I'll try Vddr mod(step2) later. It wil gives Vddr over 3.2V ...upto near Vio.

[Razor_cut]

Check the attached image

> This Vddr circuit is similar to K8T Neo2's one, but not same, I think.
> I've already found feedback line of Vddr and drain-voltage to CoreCell,
> and probably 2 pattern-cuts are required for obtaining over 3V Vddr.
> If upto 3V is enough, 1 pattern-cut is enough...
--
The prediction above was partially correct and partially not correct
K8N Neo2's Vddr circuit is almost same as K8T Neo2's one.
This mod(step1) gives upto 3.2V in case of Vddr=2.85V setting@BIOS.
In my experience, Trcd=2 setting@BIOS gives lower Vddr(2.7V, without mod),
so set Trcd=3 or Auto and use A64Tweaker, or use CoreCenter please.
Many thanks to CodeRed!!!

I'll try Vddr mod(step2) later. It wil gives Vddr over 3.2V ...upto near Vio.

Excellent!
I’m currently like you using a Booster so a memory voltage mod isn’t quite necessary. But Vddr it increases the V to the NB? or am I mistaken?

Do you maybe have an idea of Vcore mod?

Cherio

[kyosen]

Hi,

> But Vddr it increases the V to the NB? or am I mistaken?
>
> Do you maybe have an idea of Vcore mod?
--
OK, I've done several mods.
I expect that FET(Q20) generates Vdd(chipset voltage) and
FET(Q17) generates Vht(HyperTransport voltage), and now
both voltage are controllable

Vddr-mod(step2) also works fine. I've confirmed that Vddr
can be set upto 3.65V, though it depends on Vio.
In case of Vddr=3.65V, Vio is over 3.8V

Vcore is controlled by ISL6559, so mod is easy, as usual.
Connect Pin#10 and Pin#15 by 50k~25kOhm VR.

I'll disclose details near future, so stay tune!

[Razor_cut]

Great!
Thanks, I will make the mod myself in the near future.

Thanks again!

[kyosen]

Here several pics.
If you can understand japanese, quick explanation here:
http://219.113.251.125/c-board/c-boa...ne;no=2990;id=
Enjoy at your own risk

[pumbertot]

looked at those pics. but which mod is just for VDDR?
or do you have to do VDD too?
excuse the n00bishness.
did the VDDR on Neo1 was easy.is this similar?
you got any links in english???

[kyosen]

Hi,

> which mod is just for VDDR?
--
Mod by 2k-Ohm POT and orange-yellow-green wires is for Vddr.
Mod by 1k-Ohm POT and purple-blue wires is also for Vddr but optional.

> or do you have to do VDD too?
--
No, Vddr-mod and Vdd-mod are independent.

Thanks

[pumbertot]

Hi,

> which mod is just for VDDR?
--
Mod by 2k-Ohm POT and orange-yellow-green wires is for Vddr.
Mod by 1k-Ohm POT and purple-blue wires is also for Vddr but optional.

> or do you have to do VDD too?
--
No, Vddr-mod and Vdd-mod are independent.

Thanks

thanks.what connection is the green wire making?not 100% sure as its behind the other 2 in that pic.

[saaya]

is it hard to cut the trace and solder to it?

[Barr3l Rid3r]

I just don't get something, I must do step 1 (cut trace) DDR mod or I can do just the Step 2 by replacing the R402? It will work as a vdimm mod?

[ISS]

I just don't get something, I must do step 1 (cut trace) DDR mod or I can do just the Step 2 by replacing the R402? It will work as a vdimm mod?

Anyone? Cause I wish to know too.

[pumbertot]

yes you must do step 1. step 2 is optional(required for higher vdimms).

[funkflix]

Thx, but that is not what i really want! I want the 3,3V directly to the Vdimm, bcs i can turn my 3.3V on my PSU up! Like this Mod @ the K8N Neo Platinum (Socket754), dunno if its the same Layout, but i hope so.



I have BH5 and its no prob to give 3.3V every day.

[Barr3l Rid3r]

I tough I've finally got an answer

[funkflix]

Is there an "3.3V Vio = Vdimm Mod" for MSI K8N Neo2 ?

Thx in advance

[digitalfrost]

Could any1 show me where to measure VDDR? I looked at the pictures and already tried a few measuring points but I can't find the right one Sorry if thats a dumb question

[digitalfrost]

Indeed it does thx

[RebelsHaven]

Just what is Vddr and why does it track the "Memory Voltage" as it's set up in the BIOS "Cell Menu"...?

Also, checking with a DMM, there is almost zero(0) ohms between the FET lead labeled Vddr, and the positive lead of the cap that is suppose to be connected to the 3.3V rail....

I'm a little confused here... Can anyone shed any light on just what Vddr is, and why it can't be connected to the 3.3V rail...?