ATI Radeon 9800 Pro Volt modification guide

Howto by MickeyMouse @ 2003-10-14

Today we take the ATI Radeon 9800pro graphic’s card under our wing and we give it a few tweaks and modifications to push it far beyond any graphic’s card currently on the market to take your PC gaming over the edge..
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GPU Voltage Modification

Madshrimps (c)


In the search for the fastest gaming PC in the world or just for bragging right’s to the fastest benchmarks around we go looking for the newest most fastest hardware, but what we want Isn’t always available at the time we want it thus comes Overclocking and when we reach the limits of that stage of PC evolution cooling upgrades and system tweaking. Still at the end of the day when all these fail to give the results one looks for we jump into the extreme phase hardware modding.

This extreme phase is know as voltage modding and it is simply defined as adding voltage to a given circuit to extend the limits of the current hardware on the market far beyond that of what Is currently available and in some situations can put you up to 6 months to a year above all the other retail consumers of the world which is a very good thing..


Madshrimps (c)



Gpu modification work area.

(click image for zoom)
Madshrimps (c)
(click image for zoom)


To begin we start with the modification that controls the core voltage. The chip that controls voltage to the GPU is the SC1172CSW. Now instead of soldering directly to the voltage regulator IC I use an alternative point that is IMO a lot easier to work with.

Here we see I used a mounting area where I can lay the VR(variable resistor) down in a spot where I can use a ground point on the card for the front leg of the VR so only one actual wire has to be used thus making things a lot more simple and at the same time making less overall clutter and safer for handing and so on..
So now we have our spots to hook up the voltage mod we solder everything up making first to set the 10k variable resistor to maximum resistance or 10,000 ohms to start. this should be done with a multi-meter if you have not had experience before with a variable resistor and no how to set it without a meter, but you should have a meter handy as to set the core voltage later you must have a meter on hand.

Here we see the resistor hooked up to the card and it shows you what spot you will need to use your multi-meter to read the voltage from the card once the system is turned on. As an alternate you can solder a wire to this spot so you can measure the voltage without probing at the card with power on if you don’t have steady hands.

(click image for zoom)
Madshrimps (c)
(click image for zoom)
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Comment from Unregistered @ 2003/10/15
Thanks for the guide, however it would be useful to know what voltage you recommend as a guide for the GPU and the DDR.
Comment from Unregistered @ 2003/10/15
Also would be nice to know how the card with the increased voltage compares to one w/o.
Comment from piotke @ 2003/10/15
Quote:
Originally posted by Unregistered
Also would be nice to know how the card with the increased voltage compares to one w/o.
I'll pM you my adress, you mail me such a card, and I'll test it. What about that ?

Comment from jmke @ 2003/10/15
OOOOOOOOOOOOR I could contact the guide-writer and ask him for his experiences in that direction?
Comment from piotke @ 2003/10/15
also possible
Comment from Unregistered @ 2003/10/15
Woow but what about recomended volt. ??? for GPU and DDR
Comment from jmke @ 2003/10/15
the author will soon update the article with that information & more
Comment from calantak @ 2003/10/15
richyB is modding my 9800 pro on the 31st @ leuven.
Comment from jmke @ 2003/10/15
charge the batteries of that digicam mr C!
Comment from phenix5961 @ 2003/10/16
how match volt ddr and gpu for the 9800 pro??
thank
Comment from calantak @ 2003/10/16
we'll be taking pictures, if that's ok with you
Comment from jmke @ 2003/10/16
that's what charging the batteries of that digicam can do for you!


@ all other comments:

Quote:
the author will soon update the article with that information & more
Comment from jmke @ 2003/10/18
Quote:
The nominal graphics core voltage on the PowerColor card is 1.7V.

After a few experiments with the output voltage of the GPU voltage regulator, I decided to stick to 1.94V value.
Thus, I increased the output voltage of the regulator from 2.95V to 3.35V.
http://www.xbitlabs.com/articles/vid...xtreme_10.html
Comment from easypanic @ 2003/11/17
calantak, did your card got modded?

and if so, any luck with pushing it farther?
Comment from calantak @ 2003/11/17
card was modded
it got from totally stable at 472 to totally artifactlessly stable at 500, and the ram got to 800 (2*400) from 2*385
Comment from Unregistered @ 2004/03/10
Hi! Damm a hardcore Mod! I'm inpresst! :P
It's good work!
Do any of you know, where I can find a 9600XT voltMOD-guide?
Comment from confuzzedintel @ 2004/09/08
hi im new to this forum it is a very informative forum and i realy like this mod but i have a few questions, my first question is where can i find the variable resistors to do this mod, my second question is can i do both the core and the ram mod together, and my third question is what volts would be safe to run on the ram and core i will soon be drasticly upgradeing my cooling on my ram and core of my video card with ram sinks on the ram and a pelt waterblock on the core thatnk you for any help in advance
Comment from Gamer @ 2004/09/08
Location ?

local electrical shop should have the items you want.
Comment from confuzzedintel @ 2004/09/08
i live in washington where the local elctrical shop is a radio shac will they have them and do you know if i can do both at the same time
Comment from Gamer @ 2004/09/08
send them a email ?
you can do both @ the same time.
Comment from confuzzedintel @ 2004/09/08
ok thanks for the info im a moderate solder and these mods look like i can do them and maybe you can anwser my last one what is the highs safe volt with out burning it up?
Comment from confuzzedintel @ 2004/09/10
can some one please tell me the volts i need for the card after i mod it?
Comment from jmke @ 2004/09/10
all info is in this thread, read it again
Comment from piotke @ 2004/09/10
Quote:
Originally posted by confuzzedintel
can some one please tell me the volts i need for the card after i mod it?
standard voltages are around:

1.72 For core

en 2.85 for memory, above 3.4 V DDR, the memory has no advantages of more volts

 

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