MSI Ti4200 Vmods - need a final help in here

[Bugs]

OK, I´ve been searching and posting for along, searching for a Vmod for my gfx card and still without any Vmod "review" for a card similiar to mine.

It´s a MSI Ti4200 - VTP (AGP 4x; Winbond BIOS chip; Philips Video encoder chip and Samsung 4,0 ns RAM)

Some pics of the card:
http://pwp.netcabo.pt/0215012301/pics/grafica/front.jpg
http://pwp.netcabo.pt/0215012301/pics/grafica/back_IRU3007.jpg

Since there are no SCxxxx chip regulators, I had to discovered wich chip were the voltage regulator of this card, now I know it´s IRU3007, it can be seen on pic above.
Datasheet of IRU3007 chip (http://www.irf.com/product-info/datasheets/data/iru3007.pdf)

I know that pin 15 and pin 22 of that chip are the sense (Vsen 2 and Vsen 1)
Pinout:
http://pwp.netcabo.pt/0215012301/pics/grafica/IRU3007_pinout.PNG
Now the readings on those pins:
With card unplugged from PC:
Between pin 15 (Vsen 2) and ground there is 1K ohm
Between pin 22 (Vsen 1) and ground there is 17 ohm

With card plugged and PC on:
Between pin 15 (Vsen 2) and ground there is 3,15 V
Between pin 22 (Vsen 1) and ground there is 1,66 V

This readings seem to be the Vgpu and Vmem, so I think I´ve discovered the right pins, I just don´t understand the values of resistance on those pins. :confused:
So, I just need this little help in here :) anyone can help me?
Thanks.
Greetings

[Hell-Fire]

From what I understand from MrIcee's Ti4200 Vmod thread, you take the readings between the pins with the card unplugged, then multiply them by 20 to get the value you would use for the vr.

However, your measurements are kinda weird. The typical values are somewhere in the hundreds if I am not mistaken..... not 1000 and 17..?

But I could be wrong. I am also looking for a vmod for my MSI Ti4200. But I have 2 chips on the back that are very similiar to the standard, but are not SCxxxx chips.

Your voltages look correct to me. Ar eyou measuring those with the card plugged in, and the system running? Are you checking you omhs with the card unplugged?

[Bugs]

Firstly thanks for helping me, since it´s the first reply I got on this thread...
I´m checking (ohm) with card unplugged and (volt) with card plugged on and system running.

This meauserments are right, weird but right, I checked it several times.

I dunno if I should go ahead with the 20x resistance formula. :confused:

[Hell-Fire]

Well, it wont hurt it to try it.

Just be sure to check the ohms of hte resistor before plugging in the card. Make sure it is maxed out first.

Say you are using the 20x formula, then 17 x 20 is 340, so grab a 1k VR and hook that up to the card with the vr set to max ohms allowable. Then power up card and measure the voltage as you turn the resistance down.... from 1k to zero. Obviously keep close on voltage and dont go to far.

Remember, as you turn the vr down, the voltage goes up!

[Bugs]

Ok, thanks
My doubt is, where I can read voltages, in VR pins?

[Hell-Fire]

No, you will need to check around the capacitors to find where to measure your volts after soldering your vrs on. Just poke around on the solder pads to see what ya find, and the best place to actually check for monitoring is under the board where the little capapcitor "feet" punch thru. You should be able to find one that will give you voltage.

Trying to read the volts off the vr legs wont work.

You need to find where to measure you volts before you start modding away so you can monitor them so you dont give yer card way to much voltage and burn it.

As ridiculous as this is about to sound,.,,here is my suggestion to you.

**BASED ON YOUR PICS ABOVE**

Starting with the top of your card,,where you can see the fan covering the gpu,,see the things that look like cans..those are capacitors. Now, under your card, where you have that chip circled, do you see the "legs" that are punched thru? Try measuring for voltage there.

[Bugs]

Thanks...
btw I know what capasitors are ;)
I have been reading voltage of those capacitors, any seems to have the voltages I´m searchin for (Vgpu or Vmem), but thanks for the feed, I´ll try to find the right capasitors.
I should do this before drink coffee, cause my hands shack a little after I drink it. rofl
If I sucssed with this, I´ll post here.
Thank you very much.
Greetings

[Hell-Fire]

Good Luck

[Bugs]

Thanks.
Ok, I ve found 2 capasitors with 3,1 V and other 2 with 1,65 V.
Those voltage match with the 3,15 V and 1,66 V read on the voltage regulator chip. :D
Now can I use any of this capasitors to monitor both Vmem and Vgpu?
btw, can I solder directly on chip or have to use some kind of grabber?
Thanks.

[Bugs]

OK, I done it, but no change...
I have put 10 K ohm resistance in serie with a 10K ohm VR, in the pin for Vmem, monitoring on the right capacitor, no change at all...
Tryed also the 10 K ohm solo, no change too :(
Any ideas?
Thanks

[Hell-Fire]

You need to remove the VR for now. First, what resistances are you getting with the card unplugged from the puter using those pins?

After that, take that reading and multiply that by 20..that will give the setting for you VR before you solder it. Set the VR to the required resistance, then sodler it to the board.

Plug back into rig, turn on machine and jump into windows. Check your voltage, adjust it by turning the VR clockwise to raise the voltage...be careful how fast you turn it btw. I would start modest if I were you.

Also, dont use a fixed resistor and a VR for this type of mod.

[Bugs]

OK, my readings:
With card unplugged from PC:
Between pin 15 (Vsen 2) and ground there is 1K ohm
Between pin 22 (Vsen 1) and ground there is 17 ohm

With card plugged and PC on:
Between pin 15 (Vsen 2) and ground there is 3,15 V
Between pin 22 (Vsen 1) and ground there is 1,66 V

Like I said I ve already done it for Vmem, to try it
So for Vmem (pin 15) I used 20 K ohm (10 K ohm Resistace + 10 k ohm VR), and no changes on voltage.
I´ve soldered wires to capacitors so I can monitor Vgpu and Vmem, wich are 1,66 V and 3,15 V by default.
Should the problem be on the resisntace in serie (R +VR)?
Should I use a 20k ohm VR solo?
Thanks.

[Hell-Fire]

YES,,,,use the 20k in solo...do not use a series for this mod.

Come to think of it,,,,20k may be overkill in the first place...but shouldnt matter. I would use either a 5k or 10k at the most.

Be sure to set the VR to its max resistance before soldering on...that means check it with a multimeter.

[Bugs]

If so, I tryed the 10 K ohm VR in solo, and still no changes... :|

[Hell-Fire]

Well, after soldering the VR onto the correct pins, you need to power on the rig, make sure you have the mutlimeter set to check the voltages of whatver you modded, then start turning the VR clockwise to raise the voltage.

If the volts dont go up, you may have soldered the VR with it set to zero to begin with.

[bleeder]

reviving this thread from the dead because I have this exact same msi ti4200

anyone else have it? did this vmod ever get done?
seems pretty simple
it seems this isnt a very common model unfortunatly

if nobody knows of what happend here, I'll probly end up giving it a crack anyways

[CaTalyst.X]

There are 4 FB pins on that IC. One probly controls vgpu, the other vddq, the other vmem and the other vref. I think the FB pins should be the target here, not the Vsense pins. Measure resistance between those pins and GND, 20X and try the mods :D

-CaT

[bleeder]

cool, I got some poking around in the future after I get a rig back up and hit up some huge heatsink modding on that gpu (yay can do that not sff anymore)

If you know those shuttle "ICE" coolers, I wanna try using it on it :D

I seen one guy do it before. And its a hell of a heatsink anyways. Worked better than any other heatsink in those shuttles for the cpu.
:banana:

[bleeder]

My measurements are way off from what Bugs had...

Unplugged, Vsen1 shows no resistance to ground...
Vsen2 shows 4 ohms

Fb1=24
Fb2=25.75
Fb3=27.9
Fb4=25.75

My multimeter is analog so the decimal places arent exact, but it aint off by like 1k unless I'm doing something horribly wrong, but I checked the results many times. And yes I'm using the right setting (Rx1) so I'm not mistaking like 1 ohm for 10k or anything.

DMM is on my list now anyways.

[CaTalyst.X]

Help me out here HF :D

-CaT

[bleeder]

Actualy, my measurements WERE off with the analog mm, but only because there is an ohm tuner and it wasnt to zero when it should have been at zero (it was off the scale below zero), so the values might be like 10 ohms higher than I actualy measured.

Maby then Vsen1 was a few ohms, I dont remember if the needle was below zero or not though. I'll edit the new measurements in a bit.

any wisdom from HF or any other "elite" modders would be cool too :)

[Hell-Fire]

We need to know what stock voltage is for the core and the mem so we can determine which FB pin is the target here.

Whats on this chip??

[bleeder]

[that I(V)R logo] 225M
5Q7Q
F9410

Though my mobo (only one with agp) doesnt boot, it powers on, so I *should* still be able to take live measurements off the vidcard.

I'll just poke around the caps and also check the voltages on the FBs

[CaTalyst.X]

that F9410 Chip could control vdimm. But HF can help you more than I can. Wait for the word from him.

-CaT

[Hell-Fire]

Do a connectivity test on the pins of the IOR F9410 chip to see if pins #1-3 are connected to each other, pin #4 is a GND, and pins #5-8 are connected to each other.

Not sure it is being used...but possible.

[bleeder]

did you guys find a data sheet? I'm trying to find it to no avail on google.

I didnt get a groud on any of the pins so I dont know whats what from what I thought it would be with the dot in the corner I thought would be pin 1.

EDIT: no I guess I was right what I thought was pin 1.

1-3 are connected and 5-8 are connected

just 4 didnt get ground

[Hell-Fire]

A good thing to know about looking for data sheets for IOR chips is that they usually use the last line of the markings as the identifier. Then just go to www.irf.com and do a search for those markings.

Meaning, I did a search for F9410 on their site and that gave me the data sheet quickly.

IRF9410 Data Sheet (http://www.irf.com/product-info/datasheets/data/irf9410.pdf)

I only did a quick look at the data sheet, but its pretty obvious that those pins would be connected. I figured that pin #4 was marked "G" so that meant GND. Either way thats not important.

I will look this over again in a bit guys.

[Michi0815]

HI I has also this ti4200

is there a way to attach a voltmod ?

[bleeder]

back to this again

since I got my bios chip from badflash.com, my mobo is back in business and I reflashed my corrupted chip in 20 secs.. lol, good $25US and $10CAN for tax/handling

so, I got VR's, been doing some other mods, but I wanna get rolling on this now :)


kinda lost what was happening before.
I'll measure the voltages on those chips I guess and check the caps around. You guy's input is awesome. I hope I can rip up this ti4200 soon