DFI NF3 Ultra-D vdimm mod

[LittleDevil]

Does anyone have it?

http://www.shrani.si/pics/img_019656508_thumb.jpg (http://www.shrani.si/pics/img_019656508.jpg)

tnx

[Giana]

If u have the DDR Booster u dont need a VDimm Mod :D

Vsense 2 VDimm Mod should work. PSU VSense Mod and u can adjust VDimm over 3.3 V

[persivore]

Can you post some pictures of the chips around the Dimm sockets please.

[DriveEuro]

Use the booster. Either the top or bottom slot. I had that board a moth ago and was able to bend that capacitor out of the way and use the booster in the bottom dimm or the top dimm.

[Giana]

Would be nice to know all the importen readingpoints at this board.

[MAZ]

Can you post some pictures of the chips around the Dimm sockets please.

http://max-maz.hp.infoseek.co.jp/pic/MB/DFI%20nF3/1.JPG
http://max-maz.hp.infoseek.co.jp/pic/MB/DFI%20nF3/2.JPG
http://max-maz.hp.infoseek.co.jp/pic/MB/DFI%20nF3/3.JPG

[celemine1Gig]

[/IMG]http://max-maz.hp.infoseek.co.jp/pic/MB/DFI%20nF3/1.JPG[/IMG]
[/IMG]http://max-maz.hp.infoseek.co.jp/pic/MB/DFI%20nF3/2.JPG[/IMG]
[/IMG]http://max-maz.hp.infoseek.co.jp/pic/MB/DFI%20nF3/3.JPG[/IMG]

It's not the ITE chip that we are looking for:

http://www.ite.com.tw/product_info/PC/Brief-IT820x_2.asp


But what's the Intersil chip right next to the P4 Power connector (on the left side in your second pic)? Could you post a close up of that one?

[MAZ]

But what's the Intersil chip right next to the P4 Power connector (on the left side in your second pic)? Could you post a close up of that one?

OK!
http://max-maz.hp.infoseek.co.jp/pic/MB/DFI%20nF3/4.JPG

and more left side
http://max-maz.hp.infoseek.co.jp/pic/MB/DFI%20nF3/5.JPG

[persivore]

The LM324 or the LM358 could be controling Vdimm, but they look like they are too far away from the Vdimm MOSFETs. Are there any other chips around the MOSFETs close to the dimm slots?

[MAZ]

There are no chips else.
Surely, LM324 and LM358 are too far from Vdimm Mosfets.

[persivore]

There are no chips else.
Surely, LM324 and LM358 are too far from Vdimm Mosfets.
The LM324 and the LM358 are a long way from the Vdimm MOSFETs, but its still possible that they are controling Vdimm (although I would expect the Vdimm supply to be quite unstable if they are so far away)
Can you check what is written on the chip have circled above the CPU socket.

[MAZ]

The chip is 4609.
http://max-maz.hp.infoseek.co.jp/pic/MB/DFI%20nF3/6.JPG

[persivore]

Can you check the voltages at the points I've marked

[El Snorro]

there is already one?

http://www.rhcf.com/sisubb/ultimatebb.php/topic/31/125.html

[persivore]

there is already one?

http://www.rhcf.com/sisubb/ultimatebb.php/topic/31/125.html
The mod in that thread is a Vdimm = 3.3Vio mod, where the Vdimm supply will be directly supplied from the 3.3v line. I personally do not like these mods, because you are unable to adjust your Vdimm lower than your 3.3v line, and your Vdimm supply will be subject to any voltage fluctuations on your 3.3v line.
A much better way to mod the Vdimm supply on boards is to mod the Vdimm regulator, so that the Vdimm supply is properly regulated, and you have a lot more control over the Vdimm.

[HydroX]

how about this mod ?
not yet done ? hmm...i've got this mobo, and if you want me to do something, i will do it :)


Regards,
Adr

[persivore]

how about this mod ?
not yet done ? hmm...i've got this mobo, and if you want me to do something, i will do it :)


Regards,
Adr
Can you check the voltages at the points that I've marked in post #13 :)

[HydroX]

it's safe to check the voltage without cpu, memory, and vga plugged in ?


Thanks

[persivore]

it's safe to check the voltage without cpu, memory, and vga plugged in ?


Thanks
Yes, as long as you don't slip and shot something while you are doing it :)

[HydroX]

ok sir :
http://i4.photobucket.com/albums/y106/adrianus_ardya/volts2.jpg
http://i4.photobucket.com/albums/y106/adrianus_ardya/volts5.jpg

regards,
adr

[pcmoddingmy]

Thanks for the volt readings HydroX. Looks like the easiest way to do a vdimm mod is to short the Gate and Source of the VDIMM MOSFET. Since the Gate reports 4.95V, Im assuming that it is getting the power from the 5v rail. So to be safe, a variable resistor has to be used in between the Gate and Source.

We shall wait for persivore to keep us updated with the mod.

Cheers

[persivore]

Can someone check the resistance between the pin I've marked in yellow and ground please.

[HydroX]

well, if the board in off condition, it shows 625 ohm / 0.63 Kohm.
but if the board is on, nothing shows in my DMM.
If i set the max limit in the DMM to 2000 ohm, the board will shut off, but if i set higher than that, nothing shows. Is this ok ?

Regards,
Adr

[persivore]

For the Vdimm mod, try connecting a 20k VR between the yellow pin I marked and ground :).


Note: XS owners and members will not be liable for any damage caused to you or your hardware, neither can be liable for any breach of the warranty.

[HydroX]

For the Vdimm mod, try connecting a 20k VR between the yellow pin I marked and ground :).


Note: XS owners and members will not be liable for any damage caused to you or your hardware, neither can be liable for any breach of the warranty.

sir, one question from me, how is the correct way to check the resistance between the yellow marked point to ground ? When my board is on, or in off condition ?

anyway, i will try it, and will reporting back.

thank you, sir :)

[persivore]

sir, one question from me, how is the correct way to check the resistance between the yellow marked point to ground ? When my board is on, or in off condition ?

anyway, i will try it, and will reporting back.

thank you, sir :)
You need to check resistance with the power off :)

[MAZ]

i connected a 50k VR between the yellow pin and ground, Vddr fell down when I lowered resistance value.

[persivore]

i connected a 50k VR between the yellow pin and ground, Vddr fell down when I lowered resistance value.
I'll check over everything again :). Are you sure that you connected the other size of the variable resistor to ground and not some other point?

[MAZ]

I surely connected to ground.
Vddr Mod seems to be completed soon. :)

[pcmoddingmy]

While I couldn't wait for this mod to complete, I got myself a DDR Booster and it is doing up to 3.6V with this board.

Keep us informed, MAZ!

[MAZ]

I tried to Vddr mod by other pins, but a point was not found.
This MB is quite difficult to Mod.
I expect analysis of persivore.:)

[MAZ]

Dose anyone know a maker of the chip which I surrounded with a red circle?
I want datasheet of the chip.
http://max-maz.hp.infoseek.co.jp/reference/8E4D11.jpg

[persivore]

Dose anyone know a maker of the chip which I surrounded with a red circle?
I want datasheet of the chip.

That chip looks like it is too far away from the Vdimm MOSFETs to be controling Vdimm.
How much did Vdimm decrease by when you did the mod? Are you sure that you connected the VR to the correct pin on the LM324?

[craig588]

Whoa! Never check resistance with power on! You will kill things, either the multimeter, the component or yourself. (With computers the voltage should be too low, but if you were working with something about 40V or more it's enough to pass though your skin, if you happen to be moist or have cracked skin it will be a much lower voltage)

[MAZ]

I'm sorry, persivore.I made a mistake in a place of ground.

Vdimm mod, connecting a 50k VR between the 2pin of LM324(the pin persivore had marked in yellow) and ground.
Vdimm rises normally if I lower resistance value of VR.
I confirmed it to Vdimm 3.6V. It will be easy to increase more.
It is necessary to increase Vio(3.3V).

[LittleDevil]

Do you have a picture?

tnx

[MAZ]

Do you have a picture?

There are some pictures in my Blog (http://gold.ap.teacup.com/maz01/).

[xmbs]

I was wondering, would it be a difficult to make?

[celemine1Gig]

I'd say that this is a rather simple Vmod.

[xmbs]

I'd say that this is a rather simple Vmod.

I ment putting a +5v supply for memory. I had it in my NF7-S and it worked well. No need for overvolting +3.3v line.

[celemine1Gig]

I ment putting a +5v supply for memory. I had it in my NF7-S and it worked well. No need for overvolting +3.3v line.

Then why didn't you mention a single word about 5V first?

But anyway, have a look at techpowerup.com and my DFI Lanparty NF3 Socket754 Vdimm Mod, powered by the 5V-rail. Perhaps you can come up with a solution for your board after reading my article. It should work in a similar way.

[xmbs]

Then why didn't you mention a single word about 5V first?

But anyway, have a look at techpowerup.com and my DFI Lanparty NF3 Socket754 Vdimm Mod, powered by the 5V-rail. Perhaps you can come up with a solution for your board after reading my article. It should work in a similar way.

I put 5v to the message title.

Anyway, I looked at your article. There are same mosfets in this board also. I made some measurements and seems that they dont work same way. I made measurements with and without connection to the mosfet source pin. There are different voltages present.

[celemine1Gig]

I put 5v to the message title.

Anyway, I looked at your article. There are same mosfets in this board also. I made some measurements and seems that they dont work same way. I made measurements with and without connection to the mosfet source pin. There are different voltages present.


Oops, sorry, didn't look at the title. :rolleyes: :)

Well, I don't have the board, so I can't help you further, but normally there should be two mosfets powering the dimm slots. And one of those two should have a direct connection to either the 3.3V or the 5V line of the atx connector on the mobo. You can find out with the continuity test of your multimeter. Then this mosfet should also have a connection to the second mosfet, which does have vdimm on one of it's pins (again continuity test with connection to the vdimm pin on the dimm slot for example). This way you should find the right mosfet. If it's already powered by 5V, it should be fine with the vdimm mod only, of course, but if it's powered by 3.3V, you should be able to find a similar mod to the one described in my article.

Good luck!

Greetings from bavaria :toast:

Ingmar

[celemine1Gig]

Wanted to edit my previous post but that made IE crash every time :slap: :rolleyes: ´

Had a look at a pic from the first page and modified it a bit:

http://www.xtremesystems.org/forums/attachment.php?attachmentid=37857&stc=1

The 2.60V in the pic should be Vdimm (just check that as stated in my previous post). This would mean that the mosfet with the 2.6V reading is not the one needed for the 5V source mod.

Now the question is: Are all three mosfets part of the vdimm circuit, or only two. therefore you need to check for connections between those 3 fets. Additionally you should check if the points marked with the yellow lines are connected, i.e. which pin is connected either directly to the PSU's 5V or 3.3V line.

[kasius]

I'm sorry, persivore.I made a mistake in a place of ground.

Vdimm mod, connecting a 50k VR between the 2pin of LM324(the pin persivore had marked in yellow) and ground.
Vdimm rises normally if I lower resistance value of VR.
I confirmed it to Vdimm 3.6V. It will be easy to increase more.
It is necessary to increase Vio(3.3V).

Can you increase finally more than 3.6v??

Do you know how Vdimm = 3.3vio mod have to do?

thanks

[charlesbronsen]

Im intrested in this mod as well, my redlines are hungry for some more volts. If anyone has any pics of this mod, it would be great if you could post em, as i could not find any in MAZs' blog.
thanks again.

[MAZ]

Can you increase finally more than 3.6v??

Do you know how Vdimm = 3.3vio mod have to do?

thanks

It is 3.3V rail of a power supply unit.
Not mod of MB, it is mod of a power supply unit.
3.8-3.9V possible. :) Vio needs more.

[OCPerformance]

I know its an old thread but need help for this mod ;)

get the Rams the power from 3,3 Rail of the Power supply yes or ?