MSI K8N Neo Platinum VDIMM Mod?

I used a very small wire(small fan wire about 24 - 26guage) from 3.3v line to vdimm circuit and came out with 3.16v for voltage..:D

I need to know the correct amperage of the vdimm circuit to be able to know the correct resistance... (

A 3 - 5 watt resistor is good enough if you plan on using the 3.3v line... If you wanted more vdimm than 3.3v you could use the 5v line, and a bigger wattage resistor... I will figure out the amperage and do the math for 5v line and 3.3v line..

Anyone know where to find variable resistors from 3 to 10watts very low ohms?

Anyone able to add to any of this?:D

Is your board having stability problems at 3.16??

-CaT

CaTalyst.X,

NO, no stability problems... I can run 250mhz w/ 2.5, 2, 2, 5 (1t) timming stable...

The one problem with this is when the system is under load the current goes up and the voltage goes down because the resistance stays the same with just a resistor in series..

As of right now my vdimm voltage is 3.17v at idle and if I run prime it drops to 3.13v, but this is with a small wire.. I believe if I just used a small resistor it would drop even farther..

I need a clamp style amp meter.. to measure the amperage.. I tried to measure the amperage with my meter, but it poped a 10amp fuse?.. I then replaced it with a 30amp fuse and checked it with one lead grounded on a motherboard hold down screw and the other on the vdimm circuit and it was reading 24amps?

It must be reading more than the vdimm circuit?

I have extended the vdimm mod with 2 ft of 16guage wire and I believe if I had a clamp style amp meter I could measure the amperage with this wire...:D

Are you good with electrical / electronic theory? I.E. Trimpots and regulatory circuits?
If I understand it correctly, with trimpot it would be a series parallel circuit if one end is connected to the 3.3v supply and the middle is the output and the far end is grounded?
Wouldn't this created a potitental difference and divide voltage? But will this stop the voltage from dropping when the amperage goes up under load?

I really want to be able to use dimm slot 1 with the neo plat...
I would just use the OCZ booster..
"idea, maybe I could just get the the booster and solder a wire to the output to the vdimm? instead of actually placing it in the dimm slot?":D

What about chipset voltage? Since it is not adjustable... What is it set at? I noticed that the dfi has chipset voltage adjustment up to 1.9v... Can we get the neo plat chipset voltage up?:D

Id second that, but dont hold your breath. Im getting the epox version, epox mods anyone?

trader:D

Just kidding... I will continue to work on the Neo Plat, but when the DFI is available I plan on getting it..

The Neo plat has been good to me.. I have faith in it.. It just needs to be modded correctly...

I will start testing different bios soon.. I have used a couple of the bios, but I went back to 1.1

I have heard that either 1.31 or 1.33 bios is OCing better and that there will be a official 1.3 bios very soon.. The Neo still has hope...:D

Hell-Fire any word? You have any ideas on the vdimm or even chipset voltage?

I need to know the stock Vdd on this thing.

I think I have it narrowed down to what I need to mod for chipset, but I need a chipset voltage to reference as I dont have a cpu to get into to bios for comparisons.

Also, is VLdt something that we wont modded, and if so, what is the stock voltage on that as well.

Is this one of those boards where chipset can not be read without a cpu running?

Well in the bios, there is no chipset voltage reading or adjustability...

I was poking around the chipset, and the mosfet above and a little to the right of the chipset was showing:

Left leg = 3.75, Middle leg = 3.34(same as my 3.3v line), Right Leg = 1.62v..

I think that the right leg is the chipset voltage..

Above to the right of the mosfet is an IC chip that has 3.75v showing on it, so I would bet that it controls the chipset voltage..

Any ideas?:D

Yeh, on the FET that is just above and a little right of the actual NB I am reading 1.629v on the right FET leg.

If this is indeed the chipset voltage, then I think I have it figured out and will post pics once I do testing.

This is a large FET, so I would wager it is indeed for the chipset voltage. I cant think of anything else in that area that would require these types of voltages.

Okey dokey.

Got the Vdimm mod figured for sure. I am working on a way that may be easier for those who dont want to cut traces.

I will post pics tomorrow once I am done testing.

Nice job HF way to go! Jason will be happy :D

-CaT

Outstanding......:D :banana: :banana: :banana:

I got my soldering iron warming up..;)

Thank you, Hell-Fire...

hmmm..."waiting patiently for pics;) "

They are a coming bud.

I am finishing up the Chipset mod, and adding voltage monitoring atm. ;)

Wondering if I should bother worrying about a VLdt mod or not. :confused:

I would wait and see if it is needed... I think the chipset and vdimm mod will most likely do the trick...:D

Ok. I made a new thread to cover the Vdd and Vdimm mods on this board just to make things easier for all.

MSI K8N Neo Plat Mods

Someone please test the Vdimm mod for me before I have to ship this board back to the owner.

::cough:: Jason ::cough:: ;)

Hell dont sweat it if it dont work will figure it from here, I think you have had enough fun with it & when I put a CPU in it if its not just right you can send me in the right direction to get it going from the reading I get. I dont have a camera worth a hoot so keep you some good picks of it. Your work looks very good there I posted some things in the other tread about the connectors you need.

I am pretty sure the Vdimm is working fine and gonna test it tomorrow at a local computer shop just so I know....may need to adjust the thread about it if not working.

I will get on that vdimm asap.. I will also try the chipset mod..:D

Thank youuuuuuuuuuuuuuuuuuuuu:D :D :D :D :D :D :D

Quote:

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Originally posted by Hell-Fire


On a better side of things, this board does not require a Vtt mod as it tracks Vdimm. I ran the Vdimm to 3.318v, and the Vtt tracked at 1.659v. ;)

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Nice thread from jasonXXX and nice work Hell-fire in doing the mod. My hands a bit shakey for cuttin traces but knowing the VTT tracks the VDIMM mod means I can try one of the OCZ DIMMBlaster things, or whatever it is called, and hopefully get a good result. :)

Cheers to all involved with this thread.

Regards

Andy

Just as an aside, people have always mentioned IT and 2T settings for command rate for the memory and it even has it in my motherboard manual, but i do not get this option when I go to CELL or whatever it is called.

I downloaded the BIOS off the MSI web site but there is only one and that did not give it to me either. Very strange.

Any thoughts ?

Regards

Andy

when u have a C0 cpu u cant decide between 1t and 2t

Quote:

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Originally posted by Demogorg
when u have a C0 cpu u cant decide between 1t and 2t

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thanks, I guess that is only CG then. I suppose C0 sticks to 1T so less flexibility / options when overclocking. Ah well ...

Regards

Andy

Yes, (1t) only for the CO versions. Not bad though as 2T is big performance hit..

OK Jasonxxx, whats the story. Lets see some cool screen shoots 300 htt with mem 1:1. lol