MSI K8N NEO Plat Vdimm & Vdd Mods

[jess1313]

I cant say for shure if the VDD mod works or not. After hell modded the board it dont work no more. While it has power to it when it is trying to post I tried to test the voltages & see if the mods where even working. The VDD dont ajust at all( if this is the VDD that was modded) The Vdimm goes up to 2.9. It might go higher if it would post and I set the Vdimm higher in bios, but it does ajust anyway.

But it dont matter to much if the mobo want even post, with it this way I cant tell you if the vdd mod works or not.

Sorry, hope you can figure it out. It cost me a new mobo to try to help get it figured for all.

[Hell-Fire]

Thats why I dont like working on boards that I dont have cpus for guys.

I can tell from Jess's posts and attitude that he is a straight up guy, atleast I think so, but I had no way of even posting this board when I first go it.

Generally when I get components the first thing I do is post them to make sure I was not sent a dead component. Without a cpu, thats impossible to do.

One off thing I noted Jess is that when I plugged my psu into the slot and flipped the psu's power switch, the board fires right up without having to bridge the jumper on the board...?? That has never happened to me with other boards.

It did this right out of the box and obviously also after the mods.

These were simple mods, so not likely the mods killed the board. Maybe ESD or something on the board causing a short?? Take a very close look at it to see if there is foreign material on it.

[jess1313]

Well good news bad news, My flipin CPU is toast. Its a brand new CPU & was tested burted in & clocked to find results & then put back in the box.

I would have never believed that this one had died, it was one of the best I had & I was saving it. The only other one I have is a big pain to get out of the rig its in but I finily come down to it being to only posability, i had to try. So I took the rig apart and got the CPU & bingo the board fired up.

Not so good for my CPU tho it wouldnt work in my other rig either.

Well I can get a RMA on it so I'm good there.


Anyway, to the MSI. Shew I just new it was over but its what I am typing on right now. I got it fired up about 4:00 this morning.

If this all sounds crazy I am tring to hold my eyes open from this all night work & just woak up setting here with the keyboard in my lap.

Its doing good, I cant get anything out of the mods but with it running I should be able to get something going.

Vdimm only goes to 2.91v no matter what I set bios to.


Vdd doesnt do anything no matter which way I turn it. I unplug the connector & nothing changes.
I checked the VR & it seems to be open, all wires are connected but no OMS. I will try a new VR Tonight.

I got the same results as before as far as HTT/FSB.

I can do the 3.3v line to my ram, but kinda wanted to go higher, maybe we can figure it from here, seeings its working.

VDD is at 1.62v & no changing, I believe the VR is just open.

Anyway I cant stand anymore right now, I have got to go to bed.

I will dig into it tonight & try to get the VDD working & see if it helps the OC, I know 1.62 is not enough for these thing to go good bus. It takes 1.8/1.9 on all the other boards I have built.

There is all kinza stuff laying around my chair here, it will still be there when I get back up to. I will get back tonight.

P.S Hell I dont know why all these new boards do that, fire up when you plug the PSU in. But I have seen many of these a64 boards act like that. Anyway the board lives.

EDIT: replaced the VR for Vdd, and still get nothing on vdd, am soon to do 3.3v to vdimm mod....

[pumbertot]

After doinf the 3.3V to VDIMM line my Vdimm(reading from the empty cap) is steady at 3.39V regardless of BIOS. I get 8-9MHz more outa my mushkin level2 on 2-2-2-5 timings so in my eyes that is a successful mod.

[jess1313]

OK, I am back up. The VR on the VDD mod is not open it is good.
But it dont do anything for ajusting the voltage.

The mod is soldiered to pin #6, the lanparty boards use this same IC and with there mod they use pin #2. I will test and come back & edit.


OK the VDD mod is correct, I have up to 2.2v & it will probably go higher.

Hell the little black wire that went into the 3pin connector is what was open. It appears that right where it went in to the connector at the pin itself was separtated. After check OMS & it was still open with new VR I pull on the wire alittle and it pulled loose. I replaced this wire & it took off. (probably because of backprobing)

VDD MOD IS GOOD TO USE. just set VR to 10k & come up slowly.

Although it has not yeilded much better HTT/FSB, I think LDT is needed. I am 250 HTT stable though.

I am going to go to the strait 3.3v in and see what it gets & then start looking for LDT Voltage.

Atleast from there one could run BH5/6 at 250, I am totally stable at 250 HTT with 3x LDT.

Be back after more.

[Jasonxxx]

Let us know on the LDT voltage?

I'm didnt' get anything more out of the vdd mod.... so I don't know.... I believe more voltage on the ldt will help some...

[jess1313]

I am
working on it Jasonxxx, The same IC that the VDD mod is done on (LM358) is a two side regulator if I understand right. The other side may controll LDT. there is also another LM358 near the left side of the AGP slot, i feel this could also be it.....


LDT Voltage 1.2 - 1.3 - 1.4 - 1.5 is normally the ajustments in bios.

I havent fould this kinda voltage anywhere yet.

Does anyone know of a LDT mod on any other board. I am just fine doing mods that are allready figured but have never tried to figure them. If I seen how one was on a nother board it whould help.

The VDD did help me get stability, I am running 2.0v right now.

If I want to do the 3.3v=vdimm do I have to undo the adjustable mod that hell has already done on the board?

[Jasonxxx]

I would as you won't need it and it might cause a problem....

Keep us posted....

[jess1313]

I hope Hell-Fires time(thank You Hell) and this board has helped some that have it.

I never could get the LDTv worked out but the other mods work good.

The ajustable Vdimm mod is not worth doing, it would only yield 2.9v & bios offers 2.85vdimm.


The strait in 3.3v will work & get you BH series ram going & the chipset mod works perfectly.


I will not be putting anymore time in the board, frankly it just doesnt perform that good.

Good Luck Jess1313

[Hell-Fire]

Man....what a pain in the arse this turned out to be huh.

Atleast the board is not DOA..that had me worried.

Odd about the Vdimm. As irritating as this will sound, will you consider removing the ddr and the cpu, then fire it up and try adjusting the Vdimm. I got above 3v easily when working with the VR here.

On the Vldt mod idea....do me a favor, see if you get a voltage reading off of pin #25 on that chip that I removed the CoreCell sink from....or did I cover that with a sink??

Pin #25 is the Vldt Sense Pin.

[jess1313]

Tell the truth I wish the board had been what was dead. I found out I dont have warranty on the chip, I didnt even get to use it much. I guess I will buy BOX CPU from now on.

I will check Vdimm with no hardware to see if it comes up.

Pin#25 LDT sense I will check. I I will just have to wait a night or so I have racked my brain on this thing till I got aggitated, need a brake.

If we could get the LDT v going I believe its the key, I have to run it at max on all boards that have ajustment to get stable.

Its like the bus between the CPU & Chipset.

I thought the other side of the IC that ajusted the VDD was going to be LDTv but I never could for shure find a read piont to know if it was ajusting.

I need a cheap a64 like a 2700 N/C, its hard to try with a $300.00
CPU when you done lost two.

I will never understand my DTR, it was a sweat one & was dead when I pulled it back out.

It goes like this sometimes, if the board dont perform with the rest of the mods I will use it for a tester.

Anyway thanks Hell, tuesday night I will fire it back up and test these things. If the board had been dead it wouldnt of mattered,you only had so much to work with. I would have hated to go threw this blind like you did.

[Hell-Fire]

I dont own an A64 rig, so can Vldt be read without a cpu mounted??

If so we can atleast avoid killing another cpu during testing.

The other side of the Vdd IC could certainly be for Vldt, but I would expect a connection between it and the other control chip as the W83304D IC has built in regulation for Vldt. This is sometimes the case...some boards have an IC that has built in Vtt regulation, but the same board will also have a seperate IC responsible for Vtt as well.

[Barr3l Rid3r]

Hey dudes, what else uses the 3.3V instead of Ram? Is there any problem running the 3.3 rail at just 3.2V?

[WannaFly]

just a quick question

Should i set Vdimm to 2.85V or auto or whatever after i modded the Vdimm with 3.3V directly??

I mean i want to get a real 3.3V Vdimm and what should i set in Bios setup??

Thx

[pumbertot]

just a quick question

Should i set Vdimm to 2.85V or auto or whatever after i modded the Vdimm with 3.3V directly??

I mean i want to get a real 3.3V Vdimm and what should i set in Bios setup??

Thx

you get 3.3V regardless of BIOS as its connected directly to the rail.
i had a strong rail so got 3.39V great for bh-5.

[WannaFly]

you get 3.3V regardless of BIOS as its connected directly to the rail.
i had a strong rail so got 3.39V great for bh-5.

Thanks so much

[flapperhead]

whoa ,looks like u are the go to man for guys who want to contract out their mods...ill bet youve got these mods down so that they go real fast..i like doing my own mods, but boy they take a long time for me..

[Barr3l Rid3r]

Hey guys I've got 2 questions before starting mod my board. VDD Mod, you should lower resistance to increse voltage right?

Is it possible to made the 3.3V direct mod and use a 100ohms pot 1/2W between the connection to ajust voltage?

or eighther wattage and resistence is wrong?

What amperage yo've got into the 3.3V point, so I can calculate a fixed resistor to add, in case of 1/2W not beeing enough.

[pumbertot]

What amperage yo've got into the 3.3V point, so I can calculate a fixed resistor to add, in case of 1/2W not beeing enough.

check the ampage on the 3.3V rail of the PSU, you will know the max current.
it will be written on the actual PSU.

[Barr3l Rid3r]

check the ampage on the 3.3V rail of the PSU, you will know the max current.
it will be written on the actual PSU.

My PSU has 35A P=V*I so then I got 115.5W!? For 3.1V I got 108W

and a resistace about less then 0,1ohm, shi* what's wrong?

Probably if I read current in that point it would be much lower than 35A, cause it has been properly distributed already by the circuit.

Anyway, even if I got 5A there I would need a 16.5W Trimpot, so a 1/2W wont work? Pretty confused...

[pumbertot]

Any of you guys know where a test point is that I can check AGP voltage with a multimeter????????I think my mobo is undervolting the AGP but want to confirm its value before raising the VAGP.

[PnoT]

Hellfire, did you use a glue gun to attach those voltage reading spot?

Looks like it but then again it doesn't heh. I'm going to do this mod tomorrow i think after i get my board from fry's.

Nice and easy mod and great clear pics! Thanks

[funkflix]

Hi

Is the "Vdimm = 3.3v Rail Mod" working on the MSI K8N Neo2 Platinum, too?
(Socket 939) I hope so, bcs my BH5 want some Voltage!

[Hell-Fire]

Hellfire, did you use a glue gun to attach those voltage reading spot?

Looks like it but then again it doesn't heh. I'm going to do this mod tomorrow i think after i get my board from fry's.

Nice and easy mod and great clear pics! Thanks

Yes sir. hot glue gun. The connections are soldered down of course.

Hi

Is the "Vdimm = 3.3v Rail Mod" working on the MSI K8N Neo2 Platinum, too?
(Socket 939) I hope so, bcs my BH5 want some Voltage!

Yes, it is possible. I posted a reply in the other thread about this question.


Jason, I am thinking the the VLdt is controlled via the Winbond chip.

[hatemi]

Any Idea on Vcore mod anyone?