Voltmod on a Aopen Aeolus TI4200 8X?

[Riska]

Hi i have an Aopen Aeolus TI4200 8X and i have tryed to vmod it but no luck!
There is only 1 sc2602s chip on it and it is sitting in the right hand corner on the back and the full name is.

SC2602S
0234
G30300
Here is some pics!
http://www.thefatman.dk/pub/files/HPIM0498.JPG.jpg
That is the chip i was talking about!

http://www.thefatman.dk/pub/files/HPIM0499.JPG.jpg
This is a picture of the left hand side corner of the back!

http://www.thefatman.dk/pub/files/HPIM0502.JPG.jpg
Thats i a pic of the left hand corner of the front!

http://www.thefatman.dk/pub/files/HPIM0504.JPG.jpg
That is a pic of the middel of the front!

http://www.thefatman.dk/pub/files/HPIM0505.JPG.jpg
That is the Right hand corner of the front!
Is ther someone who can help me?
When i try the other voltmods on this forum the card wont boot op!:confused:

[Hell-Fire]

Are you sure that you did hte vmod correctly?

That SC2602 def is for either the vgpu or vmem..or possibly both.

[Riska]

Yes i tryed 5 times when i solder on leg 11 and ground tryed first 4kilo ohm then 3kilo and then 2100ohms and no boot!

[Riska]

http://www.thefatman.dk/pub/files/HPIM0498.JPG.jpg
Here is a pic and i have a 4.5kilo ohms vr on it an no matter what setting it vil not boot!
When i measure on pin 11 to gound the stock ohms is 7.5kilo ohms and if i try to measure when it is on the thing shut down!

[Hell-Fire]

Are you sure that what you are grounding to is actually a ground point?

Also, when you are trying to measure with the machine on, and it shuts down,,,you are in VOLTAGE for the meter and not OHMS correct?

Take the card out of the machine, take a resistence reading (ohms) between pin 11 and a ground. Whatever you get, post it here and we will go from there.

[Riska]

Ok i m sure i am grounding it right! i tryed more than a few! grounds
Pin 14 is ground also!
And i am using ohms when measurring!
i can measurre the volts ok it is 1.644volts stock!
But i wil check the ohms told about in the mod it should be 100 somthing ohms!
Why on pin 10 is it not pin 11?

[Riska]

Here is my readings whit the gfx out of the agp port!
The ones whitout numbers is 000!
http://www.thefatman.dk/pub/files/HIM0498.JPG.jpg

[Riska]

The 2 readings there sayd 243kilo is now 270kilo ohms they are rising slowly?

[Riska]

Are u there? Have you found out of something?

[Riska]

Hallo where did you go come back i need to get this mod to work!!

[Hell-Fire]

I responded to you PM Riska.

Give me a minute to look over your pic and your posts.

Also, I am looking for the data sheet that belongs to that regulator.

Gimme a bit to see what I can figure out.

***EDIT***

I have come across a french site that seems to have the vmod for this IC of yours. Give me a minute to translate it.

Good thing I took French versus Spainish. :D

[Riska]

Thats sounds good!
I haved looked all over google after the chip and mod!
But no luck!

[Hell-Fire]

Well, I found the vmod for the SC2602S IC and a Ti 4200.

Give me time to re-write the guide since it is in French and I will post it.

[Riska]

Ok and thanks!
I am looking forward to read it.

[Hell-Fire]

Question, do you have 2 SC2602S ic's onboard?

[Riska]

No i only have one!
And it is sitting in right hand side in the corner on the back of the card!

[Riska]

Have you found out of some thing?

[Riska]

dubbel post

[Riska]

I have sendt you a pm!

[Hell-Fire]

Riska,

Can ya take a pic of the entire back of the card so I can have a look? A pulled back shot ok.

Also, you didnt mention what VR you are using.....is it a 10k VR or what bud?

I am gonna post several answers and maybe a few questions on this for you so I can help us both out on this....it will help you understand a few things better.

[Riska]

http://www.thefatman.dk/pub/files/HPIM0498.JPG.jpg
Here is a pic and i have a 4.5kilo ohms vr on it an no matter what setting it vil not boot!
When i measure on pin 11 to gound the stock ohms is 7.5kilo ohms and if i try to measure when it is on the thing shut down
I wil take pic in a minute!

[Riska]

Thats was what i sayd in post 4!
About the vr!

[Hell-Fire]

Originally posted by Riska
Yes i tryed 5 times when i solder on leg 11 and ground tryed first 4kilo ohm then 3kilo and then 2100ohms and no boot!

Hopefully you have picked a proper grounding point...thats the first question. Have you confirmed that your ground is a ground? Best way is to fire up yer machine, plug the red probe from you meter into the red wire side of a molex connector from your power supply....a molex connector is the ones you plug into hard drives...just in case ya didnt know what a molex is. ;) Then place the black probe onto your grounding point you decided to use on the card..if you get something close to 5volts, you have picked a good grounding point....if not, pick another one. Best bet is something close the to mouting bracket of the card.

***Be careful not to pick something as a ground that has something on the other side of the card connecting to it as you may then run 5volts thru it, and I am not certain if that is a good thing or not! :eek: ***

Now, back to your other problem in this post of yours above. The reason you are not getting a boot after soldering you VR to pin 11 is because before the vmod you had a resistence of about 7,500ohms, and you have now lowered it substantially. Hopefully it has not killed your card...maybe there is a overvolt protecetion on it or something because you went down in resistence from 7,500ohms all the way to 2,100ohms at one point. The lower the OHMS (resistence), the more voltage is flowing.

You need to let me know what value VR you are using here.

[Hell-Fire]

Originally posted by Riska
http://www.thefatman.dk/pub/files/HPIM0498.JPG.jpg
Here is a pic and i have a 4.5kilo ohms vr on it an no matter what setting it vil not boot!
When i measure on pin 11 to gound the stock ohms is 7.5kilo ohms and if i try to measure when it is on the thing shut down!

I already addresses the shut down problem in the above post of mine as far was why it wont boot when ya have your VR set to 4,500ohms.

As for the other part, you cant measure the resistence with the card on,,,,you are checking voltage readings when the card is plugged in and the system is fired up.

Also, you wouldnt be taking voltage readings from the pins on the IC.....in my experience you obtain voltage readings from capacitor legs or the solder pads of the capacitors on the front of the card. I may be wrong here....

[Riska]

I am using 4500OHMS or 4.5KILO OHMS
I hav told you 2 times!
And the ground i am using is on the mounting bracket it self!
nealey there whit the back side pic one moment!

[Hell-Fire]

Originally posted by Riska
http://www.thefatman.dk/pub/files/HPIM0498.JPG.jpg
Here is a pic and i have a 4.5kilo ohms vr on it an no matter what setting it vil not boot!
When i measure on pin 11 to gound the stock ohms is 7.5kilo ohms and if i try to measure when it is on the thing shut down
I wil take pic in a minute!

Sorry, I think I asked you a few times what value VR you are using for this...I see from above that you are using a 4.5K VR for this.

That value according to your measurements is far to low. If you stock ohms reading on pin 11 is 7,500ohms,,,,,which shocks the hell out of me honestly, but anyway....grab a 10K, 15k, or 20k VR for this. You have to have a VR that is above you stock setting.

To be safe I may would even go for the 50k VR.

[Riska]

Yes i am meassuring on the cap just below the chip to the right abit for vgpu!
In the guide they sayd that the ohms should be 100 or 125 ohm when meassured on pin 11 and ground!
Then i thougt that it should be done when the card is on because when i meassured it when it was off i was getting 7.5KILO OHM!

[Riska]

http://www.thefatman.dk/pub/files/HPIM0511.JPG
Here is the pic it is a littel big 1.7mb!

[Riska]

ok i have all the way op to 200KILO OHMS but is it still pin 11 i have to use?

[Riska]

I have just checked the card again from pin 11 to ground there is 7.55KILO OHMS!

[Riska]

The card is farley god to oc i can hit 307 mhz gpu and 546 mhz mem whit water on gpu and nothing on ram!
Getting 14350 in 3dmark 2001se whit a barton 3200+ cpu in a abit nf7-s mobo whit 1gig ram and the cpu is not oced!

[Riska]

When i take a reading on the card between pin 11 and pin 14 there is also 7.55KILO OHMS so pin 14 is ground because when meassured on bracket and pin 14 there is 0 OHMS

[Riska]

Did you have that link to the frensh site?

[Hell-Fire]

Here is this one, but I think its in German:

http://www.tweaker.ch/guides/TI4200_voltmod/

They are saying that they expected the typical SC1102 ic's, but they instead got SC2602S ic's.

If you notice closely, they are still using pin 11 on both of the ic's that are on the card. Thats why its odd to me that your card has only one ic on the back.

This is a dumb question, but there arent any ic's on the front correct? Not sure just how far away from the reference design they have moved. It could be that they are using the one IC to control both vgpu and vmem.

And here is another site that also shows they are doing the mod regardless of whether the ic's are SC1102 or SC2602 chips. You can plainly see on the pic that they "slashed" the ic names so that people understand that either chip uses the same pin for voltage refulation. However, it could be that your card is using one ic for both: http://www.pctuner.net/php/Articoli/Articolo.php?ID=196

Here is this one as well, however you can not tell what the ic's are as they are covered:http://www.overclockers.at/attachment.php?attachmentid=17891&fullpage=1

[Riska]

I will try to do the mod ! on pin 11!

[Hell-Fire]

Good luck and keep us informed.

[saaya]

dude if you get 7.55Kohms resistance between pin 11 and ground id ask syfailure or macci about it.

i have both, a sc1102 and a 2602 chip on my card (albatron 4200P) but i got the same resistance readings on pin 11 of both chips as people who had 2 sc1102 chips, so i did the mod just like everybody else. i just finished it 5 min ago but the silicon on my card still has to dry some more (glued some tecs on my memory)

if you get diferent readings then you shouldnt do the mod everybody else did!

btw i meassured the resistance with the card powered off! pin11 to one of the large solder spots to the vga plug.

btw 307 mhz gpu and 546 mhz mem isnt too good. i get 320gpu (watercooled) and 550 memory without extra cooling or voltage.
some people get 330+ with the default aircooling and no mods!

i fired up my tec cooling yesterday at night and got the memory to 600 without any artifacts and without even changing the voltage! i hvanet tried any higher because the silicon is not hard enough to hold the tecs and colplates with the waterblocks on them (the whole card weights over 600gr now! :D)

never heard of your memory brand btw, what does it say on the chips on the right end? 4.3? can you post everything you can read on them?

[Riska]

it is ESMT ram and it is 4ns

M13L128168A- 4T
L2D2P21J5

That the hole code on the ram chips!

[saaya]

running it @4v is still within its specs! :eek: http://www.esmt.com.tw/DB/manager/upload/M13L128168A.pdf

or am i getting something wrong here?

ah no, if you scroll down it says max vdd 3.6v ... i bet your memory is running@3.3v though and if 3.6 is the max they use you can probably even go as i high as 3.8 without too many probs. nice memory! :)

thats one of the most complete pdf files ive ever seen about memory, its usually only a few pages, this one is really long.

[Riska]

Thanks now i just have to figure out were to make the vmem mod as i am missing one chip on the pcb!

[Hell-Fire]

I have read on some data sheets that one IC can actually handle both duties of the vmem and vgpu.

[Riska]

Yah i thougt that my self! but how?

[Hell-Fire]

Since I dont build the things I have no idea. LOL!

I am guessing that maybe more pins are involved in the regulation of the current..?

[Riska]

i will post the resualts of the gpumod friday! evening!

[Riska]

I have done the gpu mod and it worked!
I just tok an 100KILO ohms VR and soldered it to pin 11 and ground and then lowered th vr and then the core volt startede to raise littel at a time i am now at 1.8volt and th card vil do 345-350mhz artifact fre!
Now i just have to find out how to make the men mod?

[Hell-Fire]

Isn't it gr8 when a plan comes together.

Let me look over that data sheet again to see what pin it maybe.

[Riska]

Yea I am glad it worked when i am on 1.8volt vcore the resistance is 6.85KILO ohm where it is 7.55KILo ohms stock!

[saaya]

you soldered the vr to pin 11 and ground? hmmm

[Hell-Fire]

Originally posted by saaya
you soldered the vr to pin 11 and ground? hmmm

Huh? :confused:

[Riska]

Me to????

[Riska]

Just post when you have looked at that data sheet!

[saaya]

Originally posted by Hëll ‡ Fîrë
Huh? :confused:

what? im just surprised it worked...

[Riska]

Ok i am surprised to but it did!

[Riska]

Hell. Have you found out of something whit the VMem controller?
Coule i try to take an 200kilo vr and start whiy pin and then chek the mem volt and then the next pin and so on?

[Hell-Fire]

Not a recommended thing to do.

Since we do not know what every pin is responsible for, I am not sure what will happen if we start messing with the voltages.

You could however, start with pins that you got ohm readings for. The 200k VR would be fine for that. Be aware that at 200k ohms, that VR is gonna lower resistance quite a bit per turn if it is a 15 turn pot.

First thing to do is o/c the mem to the point where it either has artefacts or just plain hangs. Then start lowering the resistence on your POT a bit at a time to see if you can get a higher o/c. If you do not get a higher stable o/c, then you are on the wrong pin.

Did you find where to measure the vmem on the card? As in, with the card plugged in, is there a place where you can get vmem volt readings? If so, then we are in luck.

[saaya]

the sense pin on the voltage regulator of the other 4200s gave us 124ohm. if you find a pin that gives you a 124ohm reading against ground it probably is the sense pin that controls the mem voltage... "probably"... you never know :/

[Riska]

I have the same meassuring point for vmem as on all others ti4200!
So i will try to take some of the pins whit some ohms readings and try!

[Riska]

Hell!
Can you send me the data sheet for the chip on my card?
Toft@stylingnet.dk

[Venti]

Hello,

ive been following this thread from the start and was hoping to find a way to mod my terratec 4200. It has the same layout as your AOpen Riska. Only one Sc2606s controller. So i checked my board yesterday and saw that 2 traces are coming from the "usual" place where the vmem controller is positioned to the Sc2602. So i think the controller really handles both voltages. I then measured the ohmage of the controller pins and got about 126 ohm on pin 11 (gpu) and about 106 on the pin 4 (could be mem). It would be good to have the datasheet of the controller, i checked Semtech site and tried google but i didnt find the right one. I guess ill get some vr's and try it out.

[Riska]

Where did you chek the ohmage pin 11 and ?
pin 4 and?
Mine pin 4 is starting in 2kilo and rises fats til over 20kilo when measured from pin 4 and ground!

[Venti]

I held the multimeter to pin 4 and the metal of the slot attachment. Same with pin 11. Dont forget to take the card out of your mainboard.

[Riska]

I did the same and whit the card out of the slot!
I will try to set a 200kilo vr on pin 4 and then slowly lower it!

[Hell-Fire]

Originally posted by Venti
Hello,

ive been following this thread from the start and was hoping to find a way to mod my terratec 4200. It has the same layout as your AOpen Riska. Only one Sc2606s controller. So i checked my board yesterday and saw that 2 traces are coming from the "usual" place where the vmem controller is positioned to the Sc2602. So i think the controller really handles both voltages. I then measured the ohmage of the controller pins and got about 126 ohm on pin 11 (gpu) and about 106 on the pin 4 (could be mem). It would be good to have the datasheet of the controller, i checked Semtech site and tried google but i didnt find the right one. I guess ill get some vr's and try it out.

Those are the correct resistences you are reading.

The 126ohm is for the vmem most likely and the other is vgpu.

Yes, the ic does handle both voltage regulations for vmem and vgpu.

[Riska]

But what about mine i havent got does readings what do i do?
Can you send me that datasheet on the chip you have?
toft@stylingnet.dk

[Venti]

Hi,

my Vr's should arrive next week then ill do some soldering and tell you the results.

[asw7576]

Riska and Hell fire,

I've got Pixel View GF4 Ti4200 8X and I believe it's the same card as yours. It has the same chips: One Semtech CS2602S for GPU and one ACOA 0236 for memory ?

It's true when you place 5K ohm to pin 11 on CS2602S, the computer will go blank instantly. I have this experience before. So with this lucky find, I will try with 100K. Thank you very much Riska.

Riska: I see the picture of your card for VMEM, and the component's layout is exactly identical to Aopen Aelous. It's your says ACOA 0236 ? I think this chip is responsible for VMEM. Have you been able to increase the VMEM yet?

ACOA 0236 ( VMEM )

http://www.thefatman.dk/pub/files/HPIM0499.JPG.jpg


CS2602S ( VGPU )

http://www.thefatman.dk/pub/files/HPIM0498.JPG.jpg

[Riska]

No i havent !
What chip are your reffering to?

[asw7576]

I'm refering to ACOA 0236 chip. I believe this chip is responsible for VMEM. It's very small square chip ( 5 + 5 tiny pins ) located next to C2242.

I did the mod and play with some resistor value and here is my finding:

100K ohm = 325 MHz >> stable in all games + windows

83K ohm = 340 Mhz >> stable in windows but not in games ( play only 20 minutes and crash to windows ) maybe due to heat problems.

63K ohm = 350 MHz >> stable in windows but with total black out in games, I mean total crash.

Yours could go 350? wow.....

[asw7576]

Before it's too late.....

I would like to remind anyone modding CS2602, the lowest resistor value you can use safely is 88K ohm. I ruined my card with 83K ohm. The monitor screen is totally garbled (distorted) after two days and it cannot loads windows safely.

I let go the mod, but the damage is already done. Even at stock voltage, the monitor screen is still distorted.

Well... I hope I have reminded everyone.

[R*r]

i know this is a very old thread but...

i have a card that almost have the same layout...only 1 sc2602s

and i have the same measurement as riska with the pin 11 to ground is 7,5k

and i already did the vcore mood i add 87k and have the result 1,8v for the vgpu

but how about the vmem?i still cant mod it?and i realy dont understant(after reading the data sheet) how can sc2602 controlling the vgpu & vmem?

now the vmem is around 3,27 and if i increase the core clock 330/513 the vmem will decrease until 3,2 in windows....and if i bech it,it will become 3,17 and will randomly hang becouse under voltage(3,15)

if i set 330/688 the vmem will even lower...it around 3,1

any sugesstion?

[Hell-Fire]

Can you post a pic of the back of your card bud....there may be something there you are missing.

The SC2602 only has one output involved, so something else is driving Vddr.

[R*r]

ups about the vmem reading i make a mistake couse it cant be that high...i all ready read the mem datasheet and it shupose to be around 2,5-2,7 and i measure it again in another cap i found it was 2,6 sory my mistake

as for the picture my camera cant take i high detail :( tomorow i will borrow my friend cam so i can give u a clear shot

just to make a figure...

the sc2602 is place i right top side of the card like other g4ti

and the left side that suporse to be another familiar chip like other g4ti but it didnt :( theres only a

ACOA
0238

as for it i all ready try to find the data sheet,but all i got is another person that also try to find the data sheet....

im a bit suspicious with the

sc 3.3
1541 cs

it place in the front of the card,left side middle,near the hsf.

before the vgpu mod i can run 300/688 in 3dmark easy but now just start to trip in drako high...?the monitor goes blank.

i thought it was the 3,3v line supply that wasent enough...but i all ready mod it and now 12,5v 5,3v 3,6v and i think it should be more than enough?

[Hell-Fire]

It doesnt matter if you can get a high res shot or not, all we need is a decent pic of the back of the card so we can ask you questions. ;)

[R*r]

sory about the tape....

http://img29.imageshack.us/img29/8739/IMAG0013.jpg


http://img13.imageshack.us/img13/3284/IMAG18.jpg

http://img5.imageshack.us/img5/2654/IMAG0021.jpg

[Hell-Fire]

Is there any type of logo on that chip marked ACOA?

[R*r]

no logo just capital leter of ACOA and number 0238 (i guess the number just the production date?)

5 legs...

[R*r]

hope this help....

http://img12.exs.cx/img12/6991/v30.jpg

[Hell-Fire]

Is the FET 3055L reading Vddr?

[R*r]

yes it is...on the left legs,around 2,6v

i follow the circuit the left legs of the FET goes to the cap (for vmem) and the other one to R (the value never get stable?dont know why?) an after the R it goes to the top line of the ACOA but im not sure which one since it was to small for my multimeter to measure....

but i think it was the 2nd legs from left on top line...

[R*r]

i have been searching on the net and every g4ti4200 that use ACOA chip,it end with question how to mod it....

guess nobody has done it.....

[R*r]

http://www.pcstats.com/articleimages/122002/prolinkti4280_rear.jpg

http://www.pcstats.com/articleimages/122002/albatronti4280_rear.jpg

same layout as my card

[Hell-Fire]

Originally posted by R*r
yes it is...on the left legs,around 2,6v

i follow the circuit the left legs of the FET goes to the cap (for vmem) and the other one to R (the value never get stable?dont know why?) an after the R it goes to the top line of the ACOA but im not sure which one since it was to small for my multimeter to measure....

but i think it was the 2nd legs from left on top line...


On this pic, please point out which leg of the FET is reading Vddr.

http://img69.exs.cx/img69/8881/acoa.jpg

[R*r]

im sory about my prev post,next time ill do better :)

the display was a prolink card and it was the same i think....i just want to show the clear electric line....

http://img64.exs.cx/img64/3851/acoa1.jpg

hope this help...

[R*r]

:stick:

im still wondering.....:confused:

[illicit33]

i want to vmem mod i have the same layout with one chip


please help:confused: :confused: :confused:

[ZuMbAiU]

Hi everybody!I have Chaintech GX-20 AGP 8X with only one SC2602 and with GPU Volt Mod(Pin 11).I look about any DDR Vmod but without any result. For me this card is nightmare.Maybe the Aopen Aeolus TI4200 8X=Chaintech GX-20 or maybe someone have any idea for this Vddr?
My second question is for the maximum voltage that the GPU can stand. I give her 2.1 Volts -350МhZ Core .Without any Vddr mods the card make 640MhZ.
Thank`s!

[ZuMbAiU]

:CTF: People,let us finish this thread.This Vddr mod is not to be found anywhere.That info in the thread got me nowhere.I can`t understand whether this unique SC2602S control and the memory voltage and how?