View Full Version : MSI Ti4200 Vmod - need help
I have this MSI card, Ti 4200 w/ agp 4x and 128 Mb Samsung 4,0ns RAM, and there are no SCxxxx chips... :stick:
Have no idea where I can read my Vgpu and Vmem.
Any ideas?
mechl!n
06-09-2003, 08:24 AM
http://mechlin.fm.interia.pl/vm/vmod0.jpg
http://mechlin.fm.interia.pl/vm/vmod1.jpg
http://mechlin.fm.interia.pl/vm/vmod2.jpg
Thanks for information, but that s the most seen Ti 4200, I have this MSI different from those with the SCxxxxx Chip Voltage regulators.
The chips that I have on my Ti 4200 (excluding RAM, BIOS, etc) are:
-W83L785R (Winbond) - in top left corner on GPU side of card
-ACT08 - in bottom left corner on GPU side of card
-IPU3007IOR - in bottom left corner on back side of card
-225M5Q7W - in bottom right corner on back side of card
Know what... I decided to DRAW my card, editing the mechl!ns pics, since I don´t have a camera... (Hope you don´t mind):bsod:
Freaking "designs" :stick:I know, but that´s what I can do at 5 am with paint... :comp10:
So please anybody that understand those chips on this card, please help me :help:
front side:
http://pwp.netcabo.pt/0215012301/pics/front.jpg
back side:
http://pwp.netcabo.pt/0215012301/pics/back.jpg
I found this information about one of those chips on my gfx card... Anyone can take a look at it and see if this is the chip where I should do the Vmod?
Link here: http://www.chip.tomsk.ru/chip/ChipDoc.nsf/PDFSearch/AC1199214A058536C7256ADB00345859?OpenDocument
Since anybody helps me on this, can at least somebody give me a site where I can find ICs Datasheets specifications, please?!?!:confused:
Tekime
06-11-2003, 07:57 PM
Found an MSI Ti-4200 mod here (http://www.overclockers.at/attachment.php?fullpage=1&attachmentid=17891), I don't know if that helps.
Thanks, but this isn´t the same card as mine, this is the normal card, with the most seen ICs.
I guess I found the Voltage regulator IC on my card... a Winbond W83L785R
Does anybody can confirm it?
Links:
Datasheet: http://www.winbond.com.tw/PDF/sheet/W83L785R.PDF
OMG this W83L785R chip isn´t a voltage regulator, this is a hardware monitor chip:stick:
argh...:confused:
Tekime
06-12-2003, 10:47 AM
Dang, sorry I couldn't help ya out. You don't happen to ahve a few pics of that card would you? I don't have a ton of experience with the stuff but I'm in the process of vmodding my MSI Ti-4600.
I´ll try to get a camera from a friend and then i´ll post it here.
Thanks again.
Can u post pics of your card? Since I couldn´t get any camera :(
:toast:
OK, now I have pics...
Front...
http://pwp.netcabo.pt/0215012301/pics/Ti4200%20front.JPG
Back...
http://pwp.netcabo.pt/0215012301/pics/Ti4200%20back.JPG
So please, somebody help me Vmoding this card...
Thanks
mechl!n
06-19-2003, 04:36 AM
This chip (IRU3007) is voltage controler.
Datasheet:
www.irf.com/product-info/datasheets/data/iru3007.pdf
OMG finally...:D
Thank u very much!:banana:
I´ll study this datasheet now.:toast:
Hummm Can you help me on this?
I Know I have to connect a resistor from ground to FB1 and FB2 (pin 21 and pin10), is this correct? And how many ohms in that resistors?:confused: From what I read I should start with a 100 ohms resistor and decrease until I get the right voltage, right?
Thanks
Come on guys, now that I know wich chip is the voltage regulator, can anybody understand what to do with the IC?
Datasheet: http://www.irf.com/product-info/datasheets/data/iru3007.pdf
mechl!n
06-21-2003, 08:40 AM
IMO first you must check the resistance between pin 15 and ground, pin 22 and ground.
Card must be unplugged from the computer.
Then submit here results.
Ok...
Between pin 15 and ground there is 1K ohm
Between pin 22 and ground there is 17 ohm
C´mon, some help on this, please
Ok, I read the voltage on those pins (15 & 22)
pin 15 (Vsen 2): 1,66V
pin 22 (Vsen 1): 3,15V
Now what should I do? Are those values the Vgpu and Vmem?
If so, how do I raise them?
I think I´m almost there... I need this little help :D
Thanks
Hell-Fire
07-16-2003, 09:19 PM
Looks like vmem (3.15) and vgpu (1.66) to me....although the vmem looks high...but not sure.
To raise them, add a vr for each pin. Always use the middle leg and an outer leg when using VRs...never use the 2 outer legs together. Solder a wire from each pin to a vr (use a vr for each pin, not a single vr for both pins), then solder a wire from the vrs to a ground...like a screw or something that isnt conducting current.
I would use 2 10k 15 turn VRs from RadioShack. Make sure to measure them before soldering anything to them. Put the red probe on the outer leg, and the black probe on the inner leg...it doesnt truly matter which probe goes on what leg, I said it that way to reinforce using an outter leg and the inner one. Make sure you Multimeter is set to read ohms, and make sure it is measuring very very close to 10k ohms. If it isnt, turn the screw on the VR counterclockwise to increase resistance...measure agin...do this until it is as high as it will go.
Then solder the VR to your wires that are in place.
Plug the card in and fire the computer up. You whould see a slightly raised voltage for both vmem and vgpu. Then just turn the vr clockwise to increase the voltage.
BE SURE TO FIND THE PLACES TO MEASURE VMEM AND VGPU WITH THE CARD PLUGGED IN! DO NOT TRY TO MEASURE FROM THOSE PINS IN THE IC.....THE CAPACITORS SHOULD PROVIDE A PLACE TO MONITOR VOLTAGE. THEY WILL USUALLY AHVE LEGS THAT PUNCH THRU THE BACK OF THE CARD AND PROVIDE EASIER MEASURING POINTS. YOU CAN EVEN SOLDER WIRES TO THOSE LEGS TO MAKE MONITORING VOLTS EASIER. DO THIS BEFORE PLUGGING YOU CARD BACK INTO THE MACHINE AS YOU NEED TO MONITOR THE VOLTAGE YOU ARE FEEDING THE CARD SO YOU DO NOT BURN THE CARD.