Need help with K8NS Pro VDIMM mod...

[jayl]

I did find the VDIMM mods for Gigabyte K8N and K8N PRO, but just can´t find the right one for the K8NS PRO. I´ve got these two pictures which show the "wire trick" mod(covers both vdimm and vbt) for K8N nonpro/pro, but I don´t know if I can use the same mod with my K8NS PRO so if anyone could confirm this?

This is for K8N non pro


And this for the K8N PRO


More "information"() here....
http://219.113.251.125/c-board/c-boa...;tree=2245;id=

[pkrew]

It works for the K8NSNXP-939. I would suspect it would work for the K8NSpro

[jayl]

Thanks for the info pkrew. I also suspect that the mod(s) work cause atleast what I know K8N and K8NS PRO are the same board except the chipset. I just need confirmation so that I don´t burn my new board...

[jayl]

Doesn´t anyone know?

[BMORIN]

I'd like to know as well. Sitting here with solder and nowhere to put it. BTW, Jayl, how is that the above mods have no trimmer on them? Is that supposed to give it a set voltage? Don't tell me you go and adjust up your vdimm in bios after this mod.

[jayl]

I don´t exactly know why no trimmer is needed but I quess it is because that mod gives you as much vdimm as much your PSU gives from 3.3V line. So increasing your PSU´s 3.3V will increase the vdimm...

[kakaroto]

If your 3.3v rail is 3.3v , your Vddr will be 3.3v.
So its locking your Vdimm

[Augu]

Originally posted by jayl
Thanks for the info pkrew. I also suspect that the mod(s) work cause atleast what I know K8N and K8NS PRO are the same board except the chipset. I just need confirmation so that I don´t burn my new board...

As i said on the MuroBBS, Yellow=12v, Red=5v and Orange= 3.3v so lower mod is for K8NS PRO and NP.

[jayl]

Well, there you go, thanks... "problem" solved....

[nutcase]

The mod in the second Pic does work. I am able to get up to 3.85V Vdimm with it as my PSU will adjust up that high..

[HKPolice]

Jay, have you tried it? Does it work perfectly? The VTT auto tracks?

[CaTalyst.X]

Look on the bottom of your board and see if the layout is the same, if it is then the mod will work, if not, find the vdimm mosfet and use a variation of this mod.

-CaT

[Hell-Fire]

The best way to do a 3.3v = Vdimm mod is to find the FET leg reading Vdimm and then do a connectivity test between that leg and the capacitor legs that are on the back of the board nearest the other components in the Vdimm circuit. It may be very obvious which capacitor is the correct one if traces are easily seen and followed, but the connectivity test is the fastest and safest way to find it.

Once you are sure which capacitor is in the same circuit as the FET, then connect a wire from the 3.3v solder point and that capacitor leg.

[jayl]

Originally posted by HKPolice
Jay, have you tried it? Does it work perfectly? The VTT auto tracks?

Actually I haven´t tried it. I´ve been meaning to but been so busy last couple of weeks.

I´ve been planning to do the vdimm mod with a 580kohm trimmer so the max vdimm would be about 2.9-3V. I figured out that these EB´s are not gonna work great with that much (3.3V) vdimm 24/7...

Anyway thanks for the advices 4 all...

[nutcase]

The layout of the K8NS pro is identical to the K8N pro.. The Mod I did is the same as the Pic above..

This I did with my Pc3500EB at 3.8V.. Psu I used was an OCZ Powerstream 420W and that is how I got 3.8V

having some minor stability problems which may indicate VTT might not be tracking. I will light the system off sometime and see what the VTT voltage is reading..

[esoteradactyl]

vtt tracks fine with the 3.3v rail pumped straight to the dimm slots. the older way to mod the board required you to mod both the vdimm and vtt. this newer version owns

[nutcase]

here is my Mod on the K8NS pro.. As you can see it looks identical to the K8N Pro..

[TodB]

Originally posted by hag6br
here is my Mod on the K8NS pro.. As you can see it looks identical to the K8N Pro..

So this mod basicly locks the Vdimm to 3.3V?!?

[esoteradactyl]

Originally posted by TodB
So this mod basicly locks the Vdimm to 3.3V?!?

3.3v is the least amount of voltage you can use. anything higher requires your psu to be modded.

[TodB]

OK... got it

What I ment was that your Vdimm is locked to the 3.3V rail... and the Vdimm BIOS Options don't work anymore...
But 3.3V is a little high for my memory right now... both won't run with that high voltage....Kingston BGA DDR400 and A-DATA Vitesta DDR500...

[jonyutah]

Is thare any way to up the vdimm without locking it to 3.3v What pot would you use if you can?

[Hell-Fire]

Without a pic of the top of the board, I have no idea if Vdimm can be done a different way...although I am betting it can be as there is a regulator somewhere.

Value of the VR depends on several factors and type of mod done.

Post a pic of the top of the board please.

[jonyutah]

I don't have a digital camera, but i did find this mod of the k8n pro which is the same layout. Im not sure what Pot is there on either mod though. any ideas? hope this pic uploads

[jayl]

I don´t know what are the places where you have to solder. But I do know that with 560 kOhm you get ~2.9Vdimm and with a 680 KOhm you get ~3.0V... I have to ask Augu cause he knows...

[jonyutah]

where did you get those numbers from? is there a way of working it out? in this pic you can see the resistor to solder to and the other solder point is just a ground. I would like to max it out at about 3.3v but have everything else below.

Is it possible to use a VR, if so which?