v mods for asus delux v8420 ti4200 with BGA ram

[Geforce4ti4200]

anyone heard of that ti4200? Its a parrallel to the albatron. anyway I used tweakmonster sinks and only gained 10MHz, ram needs more volts. can one fixed resistor be used for each. say 15k ohms for the core and another for the ram for example. a 10 minute soldering job and I am done. I dont want to push too many volts, say 1.85 is reasonable. I am new to this so id like some starting tips

[Hell-Fire]

Can ya take pics of the back of the card and post em?

You said it is similiar to the Albatron. Does that mean you have seen a mod for the Albatron? If so, then compare the ICs on that Albatron to your card to see if there is match. If so, you can follow their guide, but just make sure your resistance readings on the pins to be modded match the ones on the Albatron, or relatively close, just to make certian you dont need a bigger resistor.

[MrIcee]

Here is a link to the mod. Remember, the Ti4600 is identical. All you needed to do was a search here in our Graphx section as I did.
http://www.cluboverclocker.com/guides/ti4600_mod/page3.htm

This is a Ti4600 mod with fixed resistors, tho you could substitute 5 to 10K VR's in their place.

For Ti4800's, its a different mod as the 9840TVD uses ISL Voltage regulators.

Randi:D

[Geforce4ti4200]

That means my asus v8420 should have the SC1102CS and SC1175CSW chips. I would need to remove the card from my pc and I will do so in a few. also the guide explains to use 1k ohm for the gpu and 720 ohms for the memory, thats all theres to it? Sorry if my questions sound dumb, im new to this and better to learn about it fully before jumping. thanks for your time

[MrIcee]

Thats all there is to it:) Yes, your 8420S has those regulators, as I've owned and modded a couple in the past. The 19,600 run I accomplished with the Intel setup that stood at # 1 for 3 months was done with that card:)

I prefer Variable Resistors(VR's) myself, as you can adjust voltage to taste or needs, rather than being stuck with 1 voltage after the modification.

Randi:D

[Geforce4ti4200]

I dont suppose the mod could easily be undone by removing the resistor. a different value resistor could easily be used. How good is a thermaltake copper Geforce4 cooler? 1.66 to 1.81 volts isnt that much of an increase and my cards not even warm. Those tweakmonsters may come real handy for the mem mod. Oh must a specific soldier be used? I dont think mine contains silver. it does conduct however. Is it neccessary to measure the volt before modding for the chance it could be different than 1.66?

[bldegle2]

solder for the deed and a 15watt thin tipped iron, radio shack, about $15, you can get the solder there too.

the solder comes in a clear tube and is a coiled thin wire for ease of use.

use pots, soldering over and over again will certainly increase the chance of a problem.

good luck.

baldy

[Geforce4ti4200]

before my ti4200 gets modded, any clue where the vcore and vram voltage checkpoints are? probably on the back somewhere and I use the red stick to measure, not the black stick

[texuspete00]

Hope you dont mind asking a Q in your thread but its pertinent and keeps the forum clean :)

Mr Icee or anyone who's done it, in that link they use 1k to bring core up to 1.81v and 720 ohm to bring mem to 3.1v. So if you want to use VR's you think two 5k's would be best to use (1 for each mod). Or peraps a 1k would be fine for the mem to give better adjustments?

The link also states for those on air to use lower resistence? That doesnt make sense to me but what do I know....

Thanks for replies. I'm making a semi-dated bench rig for fun and am hopefully picking one of these up a GF4 w/ VR's from kunaak. Just need to know what VR's to ask for.

[Geforce4ti4200]

I am happy you asked that question cause id like to know as well. I am pretty sure the lower the ohm, the higher the volts. using a 5k ohm instead of a 1k would only slightly raise the voltage. I still want to see if anyone knows where I can find out where my ti4200s voltage is at. I must confirm if its 1.66 for vgpu

[mattsmall]

Originally posted by Geforce4ti4200
I am pretty sure the lower the ohm, the higher the volts.
yes

using a 5k ohm instead of a 1k would only slightly raise the voltage.

no a 5k would put less volts into the core

[Geforce4ti4200]

I will soon mod my ti4200. so ill need a 1000 ohm and a 700 ohm, right? where on the back are the voltage checkpoints anyway?

[Hell-Fire]

What are the resistance readings you are getting from teh pins you plan to mod btw?

I talked with MMouse yesterday about that very thing, and he recommended checking the cap legs on the back of the card. Find out which one is the ground and then measure the "hot" leg with the card powered on.

To find out which leg is ground, place black probe on a ground point (dont put the black probe on a cap leg, use something else on the card to ground to), then place the red probe on each leg per cap. Any leg you get a reading of 0.0-0.2 ohms is the ground...thus the other leg for that cap must be the hot leg. That step is done with the card unplugged.

Replug in the card, and power it up. Look for voltages that are in the range of the expected voltage. I would check voltages at all the caps on the back of the card, and after doing the mod, recheck and compare to see where the voltage is now increased. There is your monitoring spot in case you decide to remod the card with VRs versus fixed resistors.

[Geforce4ti4200]

Originally posted by MrIcee
Thats all there is to it:) Yes, your 8420S has those regulators, as I've owned and modded a couple in the past. The 19,600 run I accomplished with the Intel setup that stood at # 1 for 3 months was done with that card:)

I prefer Variable Resistors(VR's) myself, as you can adjust voltage to taste or needs, rather than being stuck with 1 voltage after the modification.

Randi:D


I have noticed my voltage regulators on my ti4200 are different than the one you saw in the ti4600 I linked you to.


The big regulator says
SC1175CSW
0240
G28177

The small regulator says
SC1102CS
0240
G30490-3


I heard one slip when measuring voltages and your cards gone. sounds easier just to sodier a resistor and hope I gain higher overclocks! If anyone has a card with regulators of the same value, let me know. I use a 1k fixed resistor to the gpu, right? I want to be 100% sure first

[Geforce4ti4200]

update:

the small one is the gpu regulator. Pin 11 measures 96.8 ohms resisance while pin 14 is ground.


http://www.cluboverclocker.com/guid...0_mod/page3.htm


same as in the guide. will you be able to formulate what ohm resistor ill need based on the 96.8 ohms my pin 11 gives? I dont know what resisance they got in that guide nor do I know the math, is a 1k ohm good for mine based on the 96.8 resisance? I want to be sure :) I realize my ti4200 is like the ti4600 in the guide but the numbers on the volt controller is different however

[Geforce4ti4200]

I am told a 1k ohm resistor will work for me, can anyone confirm this quick?

[SPQQKY]

Here are the reading points. At that reading, I would start with 2k OHm. I would get variable resistors to make you mod a little safer and more efficient. At 96.8 Ohm you'd want to start with a number 20x that, so 96.8x20=1.936KOhm. This would basically start you out at the same voltage, then with a VR, you can slowly lower it to increase voltages.