Guide to volt mod your GF4

janusz · Jul 10, 2002, 11:03 AM

many people want more and thats fine but for those who go extreme need skillz and ballz

step#1 you need toolz
1.(1) R1 130Ohm to 390Ohm for core
2.(1) 270 Ohm resistor for core
3. solder (skillz needed)
4. Visiontek GF4 ti4400
5.VOLT METER i stress this enough
6.also to do mods on another geforce 4rather than a visiontek scroll down for pics....
7. almost all gf4's are the same..just check to see if you have the right chips.

There is a special SC1175CSW chip on the card responsible for the graphics CORE voltage
heres is the diagram:

Step#2
I used a R1 resistor with an additional one soldered to pins 18 and 20:

default chip voltage equals to 1.66V As soon as you use the R1 with an additional 620Ohm resistor, the graphics CORE should be 1.92V.

Step#3 MEMORY OVERVOLTING

This voltage is formed by SC1102CS chip from Semtech. This chip works absolutely the same way as SC1175CSW chip mentioned above, with that only difference that it has one channel instead of two independent channels of SC1175CSW.

*reference voltage of SC1102CS equals to 1.265V
use this formula to calculate volt with diff resistors {Vout=1.265x(1+R8/R7) }

here is the power supply circuit scheme

In order to install the additional voltage regulator, you need to remove the VDD and VDDQ circuits first by unsoldering the bridges on the front side of the PCB (see the picture below)

And on the reverse side of the PCB:

Then you should solder the voltage regulator for the graphics memory chips input/output buffers (the spots for components are perfectly shown on the photos). Of course, it is not difficult at all for an experienced person, however, it would save you even more effort if you use a simple diode. Let me explain. As is known, in case of direct connection the voltage of silicon diodes usually drops down by 0.7V-0.8V. Therefore, you can painlessly increase the voltage of the graphics memory chips internal circuits (VDD) up to 3.5V, for instance and transfer the power to input/output buffers from VDD via the diode.

This is what I have done. First of all, I increased the Vout on the voltage regulator up to 3.51V by shunting the SC1102CS chip with a 270Ohm resistor (it was soldered to pins 11 and 14):

This way, the voltage of the internal circuits of the graphics memory chips was increased from 2.82V to 3.51V.

Secondly, I searched through my collection of PSUs and found a powerful silicon diode. I immediately soldered this lucky find instead of the bridges

Now the voltage of the input/output buffers of the graphics memory chips equals 2.77V, as the voltage on the diode dropped by 0.74V.

Now that we have increased the voltages, we have to make sure that our graphics card is supplied with appropriate cooling. As you know, overclocking makes the lifetime of our hardware shorter, and voltage modifications nearly exhaust our poor hardware. Certainly, efficient cooling can not only allow getting the card to work at higher frequencies but also ensure longer reliable functioning

also here are some other people (macci) who voltmodded there 4600

[COLOR=red]***PLEASE BE CAREFULL WHEN DOING STUFF LIKE THIS.....ALSO FEEL FREE TO ONLY DO ONE MOD (CORE) OR (MEMORY) *** [/COLOR]

[COLOR=blue]***ALSO PROVIDE GOOD COOLING, THE GF4 REAL GETS HOT JUST PLAIN STOCK!!***[/COLOR] thnx to xbit labs for the pix

Part 2
now to cool you toasty BEAST

options are air cooling it or water cooling.
best bet woul dbe water cooling ...here are some lovely waterblocks to make it easier for you to sleep.

1.[COLOR=red]Danger Den GeForce4 Block[/COLOR]

now if your afriad it wont house ramsinks nahh dont worry the fittings are postioned at a 45 degree angle

2.[COLOR=red]Gemini Cool Video Cooler (Geforce) [/COLOR]

this one is a must if your ordering a D-tek water cooling system or not!

or if ya aint got dough you can always settle for plain copper

3.now for air cooling ( not really sutible but these can handle it)

[COLOR=red]Thermaltake GeForce 4* Highest Performance cooler[/COLOR]

-Application for NVIDIA GeForce4
Ti4200,Ti4400,Ti4600
-Dow corning T-340 thermal grease interface material
-68x60x12.8 mm
-Push pin easy to install
-3 pin fan connector
also a 5500±10% R.P.M fan speed

4.well i think thats reall the best retail HSF for the gf4....next you can use a custom hsf for your gf4 like a old HSF or these..

AKASA silvermountain

or

a plain cooler master

http://www.dtekcustoms.com/

i wish everyone luck with your modding and please be careful

sites ive been to:

http://www.dtekcustoms.com/
http://www.dangerden.com/
http://www.xbitlabs.com/ www.newegg.com http://www.thermaltake.com/

shuki · Jul 10, 2002, 11:11 AM

oh boy.... I see a few ruined GF4's out of this post

as for shuki, he lacks both skills and balls to even think about this mod

edperks · Jul 10, 2002, 12:22 PM

Great Article, Its funny I just order a TI4200 This morning to replace my 8500 I guess I will be busy when it come in doing a little modding!!! Great Review

janusz · Jul 10, 2002, 12:28 PM

now that you have your core snuggled up with a frosty hsf or block, its time to consider those lil BGA memory modules.

1.RAM-SINKS (very common and ok for the voltmod)
2.AS3 epoxy or any other silver epoxy

[COLOR=red]DANGER DEN RAM SINKS[/COLOR]

these are very nice in aiding cooling

heres how they look for the fashion freaks

[COLOR=red]Thermaltake DDR SDRAM HEAT SINK[/COLOR]

-BLUE ANODIZE
-HIGH CONDUCTIVTY THERMAL PAD
-CROSS CUTTING

[COLOR=red]Tin Coated BGA Ramsinks 4 Pack[/COLOR]

these are tin coated and you can get em from the heat sink factory

ok now to have fun..... lil guide to make a ddr hsF<----- put lil fans on your mhsf

parts:
1-(8) small 28x28x8mm fans here

2-(8) lil heatsinks for your BGA ramhere

next put em together and use AS3 epoxy to glue hs to BGA ram

OUTCOME:

(thnx to karatekid)

ATiWillCrumble · Jul 11, 2002, 07:31 AM

love the tiny fans ooo cool!

janusz · Jul 11, 2002, 08:35 AM

Quote:

Originally posted by ATiWillCrumble
love the tiny fans ooo cool!

they spin at 10,000 rpm heh

Bambers · Jul 12, 2002, 01:06 AM

lol. 10000 rpm?

What kind of noise do they make?

janusz · Jul 12, 2002, 09:30 AM

Quote:

Originally posted by Bambers
lol. 10000 rpm?

What kind of noise do they make?

not too much..you see the smaller diameter you have the faster you have to spin to make enough CFM to cool anything....there ok

ATiWillCrumble · Jul 12, 2002, 10:50 AM

ah drool.

Yeti · Jul 13, 2002, 03:09 AM

Where did you get these ramsinks?

Quote:

parts:
1-(8) small 28x28x8mm fans here

2-(8) lil heatsinks for your BGA ramhere

next put em together and use AS3 epoxy to glue hs to BGA ram

And the fans lol... what resaler?

janusz · Jul 13, 2002, 09:54 AM

Quote:

Originally posted by Yeti
Where did you get these ramsinks?

And the fans lol... what resaler?

http://www.sunon.com.tw/index_en.htm
http://www.dynatron-corp.com/prodDet...rB=fanlist.asp

Karatekid · Jul 20, 2002, 12:37 PM

Quote:

Originally posted by janusz

OUTCOME:

(thnx to karatekid)[/b]

For those interrested: I posted up the entire thread (review-style) @ the MO forums.
Check: http://discuss.madonion.com/forum/sh...950704&fpart=1

To janusz: I made the first link work again, and uploaded larger pics. ;P

(oh, and btw; thnx for the vmodding stuff. A lotta folks (me included) needed that!)

Jul 10, 2002, 12:28 PM	Thread Starter #4
janusz Abit Staff Join Date: Jul 2002 Posts: 124 Rep Power: 0	COOLING GUIDE PART 2 FOR MEMORY!!! (56 warning) now that you have your core snuggled up with a frosty hsf or block, its time to consider those lil BGA memory modules. 1.RAM-SINKS (very common and ok for the voltmod) 2.AS3 epoxy or any other silver epoxy [COLOR=red]DANGER DEN RAM SINKS[/COLOR] these are very nice in aiding cooling heres how they look for the fashion freaks [COLOR=red]Thermaltake DDR SDRAM HEAT SINK[/COLOR] -BLUE ANODIZE -HIGH CONDUCTIVTY THERMAL PAD -CROSS CUTTING [COLOR=red]Tin Coated BGA Ramsinks 4 Pack[/COLOR] these are tin coated and you can get em from the heat sink factory ok now to have fun..... lil guide to make a ddr hsF<----- put lil fans on your mhsf parts: 1-(8) small 28x28x8mm fans here 2-(8) lil heatsinks for your BGA ramhere next put em together and use AS3 epoxy to glue hs to BGA ram OUTCOME: (thnx to karatekid) __________________ P4 3.06 @ 3.8GHz ABIT-BE7-G 512 pc 3500 3 Radeon 9700's @ 445/775 audigy 2 2X 200 WD special edition HDD's KURWA

Jul 11, 2002, 07:31 AM	#5
ATiWillCrumble DriverHeaven Junior Member Join Date: Jul 2002 Posts: 90 Rep Power: 0	love the tiny fans ooo cool! __________________ bored bored bored.....erm bored hmmmm f00d

Jul 12, 2002, 10:50 AM	#9
ATiWillCrumble DriverHeaven Junior Member Join Date: Jul 2002 Posts: 90 Rep Power: 0	ah drool. __________________ bored bored bored.....erm bored hmmmm f00d

Jul 10, 2002, 11:03 AM	#1
janusz Abit Staff Join Date: Jul 2002 Posts: 124 Rep Power: 0	Guide to volt mod your GF4 (56 warning) many people want more and thats fine but for those who go extreme need skillz and ballz step#1 you need toolz 1.(1) R1 130Ohm to 390Ohm for core 2.(1) 270 Ohm resistor for core 3. solder (skillz needed) 4. Visiontek GF4 ti4400 5.VOLT METER i stress this enough 6.also to do mods on another geforce 4rather than a visiontek scroll down for pics.... 7. almost all gf4's are the same..just check to see if you have the right chips. There is a special SC1175CSW chip on the card responsible for the graphics CORE voltage heres is the diagram: Step#2 I used a R1 resistor with an additional one soldered to pins 18 and 20: default chip voltage equals to 1.66V As soon as you use the R1 with an additional 620Ohm resistor, the graphics CORE should be 1.92V. Step#3 MEMORY OVERVOLTING This voltage is formed by SC1102CS chip from Semtech. This chip works absolutely the same way as SC1175CSW chip mentioned above, with that only difference that it has one channel instead of two independent channels of SC1175CSW. reference voltage of SC1102CS equals to 1.265V use this formula to calculate volt with diff resistors {Vout=1.265x(1+R8/R7) } here is the power supply circuit scheme In order to install the additional voltage regulator, you need to remove the VDD and VDDQ circuits first by unsoldering the bridges on the front side of the PCB (see the picture below) And on the reverse side of the PCB: Then you should solder the voltage regulator for the graphics memory chips input/output buffers (the spots for components are perfectly shown on the photos). Of course, it is not difficult at all for an experienced person, however, it would save you even more effort if you use a simple diode. Let me explain. As is known, in case of direct connection the voltage of silicon diodes usually drops down by 0.7V-0.8V. Therefore, you can painlessly increase the voltage of the graphics memory chips internal circuits (VDD) up to 3.5V, for instance and transfer the power to input/output buffers from VDD via the diode. This is what I have done. First of all, I increased the Vout on the voltage regulator up to 3.51V by shunting the SC1102CS chip with a 270Ohm resistor (it was soldered to pins 11 and 14): This way, the voltage of the internal circuits of the graphics memory chips was increased from 2.82V to 3.51V. Secondly, I searched through my collection of PSUs and found a powerful silicon diode. I immediately soldered this lucky find instead of the bridges Now the voltage of the input/output buffers of the graphics memory chips equals 2.77V, as the voltage on the diode dropped by 0.74V. Now that we have increased the voltages, we have to make sure that our graphics card is supplied with appropriate cooling. As you know, overclocking makes the lifetime of our hardware shorter, and voltage modifications nearly exhaust our poor hardware. Certainly, efficient cooling can not only allow getting the card to work at higher frequencies but also ensure longer reliable functioning also here are some other people (macci) who voltmodded there 4600 [COLOR=red]PLEASE BE CAREFULL WHEN DOING STUFF LIKE THIS.....ALSO FEEL FREE TO ONLY DO ONE MOD (CORE) OR (MEMORY) * [/COLOR] [COLOR=blue]*ALSO PROVIDE GOOD COOLING, THE GF4 REAL GETS HOT JUST PLAIN STOCK!![/COLOR] thnx to xbit labs for the pix Part 2 now to cool you toasty BEAST options are air cooling it or water cooling. best bet woul dbe water cooling ...here are some lovely waterblocks to make it easier for you to sleep. 1.[COLOR=red]Danger Den GeForce4 Block[/COLOR] now if your afriad it wont house ramsinks nahh dont worry the fittings are postioned at a 45 degree angle 2.[COLOR=red]Gemini Cool Video Cooler (Geforce) [/COLOR] this one is a must if your ordering a D-tek water cooling system or not! or if ya aint got dough you can always settle for plain copper 3.now for air cooling ( not really sutible but these can handle it) [COLOR=red]Thermaltake GeForce 4 Highest Performance cooler[/COLOR] -Application for NVIDIA GeForce4 Ti4200,Ti4400,Ti4600 -Dow corning T-340 thermal grease interface material -68x60x12.8 mm -Push pin easy to install -3 pin fan connector also a 5500±10% R.P.M fan speed 4.well i think thats reall the best retail HSF for the gf4....next you can use a custom hsf for your gf4 like a old HSF or these.. AKASA silvermountain or a plain cooler master http://www.dtekcustoms.com/ i wish everyone luck with your modding and please be careful sites ive been to: http://www.dtekcustoms.com/ http://www.dangerden.com/ http://www.xbitlabs.com/ www.newegg.com http://www.thermaltake.com/ __________________ P4 3.06 @ 3.8GHz ABIT-BE7-G 512 pc 3500 3 Radeon 9700's @ 445/775 audigy 2 2X 200 WD special edition HDD's KURWA

Jul 10, 2002, 11:11 AM	#2
shuki DriverHeaven Senior Member Join Date: May 2002 Location: in the hidden place Posts: 1,975 Rep Power: 0	oh boy.... I see a few ruined GF4's out of this post as for shuki, he lacks both skills and balls to even think about this mod

Jul 10, 2002, 12:22 PM	#3
edperks HardwareHeaven Senior Member Join Date: May 2002 Location: Southern Illinois Posts: 780 Rep Power: 0 System Specs	Great Article, Its funny I just order a TI4200 This morning to replace my 8500 I guess I will be busy when it come in doing a little modding!!! Great Review

Jul 12, 2002, 01:06 AM	#7
Bambers DriverHeaven Junior Member Join Date: Jun 2002 Location: Bristol, UK Posts: 25 Rep Power: 0	lol. 10000 rpm? What kind of noise do they make?

**Guide to volt mod your GF4**

Guide to volt mod your GF4